diff --git a/python/src/content/context.rs b/python/src/content/context.rs
index 579016364..6c9b37f5d 100644
--- a/python/src/content/context.rs
+++ b/python/src/content/context.rs
@@ -2,13 +2,13 @@ use std::sync::Arc;
 
 use longbridge::{
     blocking::ContentContextSync,
-    content::{CreateTopicOptions, MyTopicsOptions},
+    content::{CreateReplyOptions, CreateTopicOptions, ListTopicRepliesOptions, MyTopicsOptions},
 };
 use pyo3::prelude::*;
 
 use crate::{
     config::Config,
-    content::types::{NewsItem, OwnedTopic, TopicItem},
+    content::types::{NewsItem, OwnedTopic, TopicItem, TopicReply},
     error::ErrorNewType,
 };
 
@@ -46,7 +46,9 @@ impl ContentContext {
             .collect()
     }
 
-    /// Create a new topic
+    /// Create a new community topic.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=create_topic>
     #[pyo3(signature = (title, body, topic_type = None, tickers = None, hashtags = None))]
     pub fn create_topic(
         &self,
@@ -87,4 +89,41 @@ impl ContentContext {
             .map(TryInto::try_into)
             .collect()
     }
+
+    /// Get full details of a topic by its ID
+    pub fn topic_detail(&self, id: String) -> PyResult<OwnedTopic> {
+        self.ctx.topic_detail(id).map_err(ErrorNewType)?.try_into()
+    }
+
+    /// List replies on a topic
+    #[pyo3(signature = (topic_id, page = None, size = None))]
+    pub fn list_topic_replies(
+        &self,
+        topic_id: String,
+        page: Option<i32>,
+        size: Option<i32>,
+    ) -> PyResult<Vec<TopicReply>> {
+        self.ctx
+            .list_topic_replies(topic_id, ListTopicRepliesOptions { page, size })
+            .map_err(ErrorNewType)?
+            .into_iter()
+            .map(TryInto::try_into)
+            .collect()
+    }
+
+    /// Post a reply to a community topic.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=create_topic_reply>
+    #[pyo3(signature = (topic_id, body, reply_to_id = None))]
+    pub fn create_topic_reply(
+        &self,
+        topic_id: String,
+        body: String,
+        reply_to_id: Option<String>,
+    ) -> PyResult<TopicReply> {
+        self.ctx
+            .create_topic_reply(topic_id, CreateReplyOptions { body, reply_to_id })
+            .map_err(ErrorNewType)?
+            .try_into()
+    }
 }
diff --git a/python/src/content/context_async.rs b/python/src/content/context_async.rs
index ca390a449..f24b51576 100644
--- a/python/src/content/context_async.rs
+++ b/python/src/content/context_async.rs
@@ -1,11 +1,14 @@
 use std::sync::Arc;
 
-use longbridge::content::{ContentContext, CreateTopicOptions, MyTopicsOptions};
+use longbridge::content::{
+    ContentContext, CreateReplyOptions, CreateTopicOptions, ListTopicRepliesOptions,
+    MyTopicsOptions,
+};
 use pyo3::{prelude::*, types::PyType};
 
 use crate::{
     config::Config,
-    content::types::{NewsItem, OwnedTopic, TopicItem},
+    content::types::{NewsItem, OwnedTopic, TopicItem, TopicReply},
     error::ErrorNewType,
 };
 
@@ -51,7 +54,9 @@ impl AsyncContentContext {
         .map(|b| b.unbind())
     }
 
-    /// Create a new topic. Returns awaitable.
+    /// Create a new community topic. Returns awaitable.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=create_topic>
     #[pyo3(signature = (title, body, topic_type = None, tickers = None, hashtags = None))]
     fn create_topic(
         &self,
@@ -101,4 +106,58 @@ impl AsyncContentContext {
         })
         .map(|b| b.unbind())
     }
+
+    /// Get full details of a topic by its ID. Returns awaitable.
+    fn topic_detail(&self, py: Python<'_>, id: String) -> PyResult<Py<PyAny>> {
+        let ctx = self.ctx.clone();
+        pyo3_async_runtimes::tokio::future_into_py(py, async move {
+            let v = ctx.topic_detail(id).await.map_err(ErrorNewType)?;
+            OwnedTopic::try_from(v)
+        })
+        .map(|b| b.unbind())
+    }
+
+    /// List replies on a topic. Returns awaitable.
+    #[pyo3(signature = (topic_id, page = None, size = None))]
+    fn list_topic_replies(
+        &self,
+        py: Python<'_>,
+        topic_id: String,
+        page: Option<i32>,
+        size: Option<i32>,
+    ) -> PyResult<Py<PyAny>> {
+        let ctx = self.ctx.clone();
+        pyo3_async_runtimes::tokio::future_into_py(py, async move {
+            let v = ctx
+                .list_topic_replies(topic_id, ListTopicRepliesOptions { page, size })
+                .await
+                .map_err(ErrorNewType)?;
+            v.into_iter()
+                .map(|x| -> PyResult<TopicReply> { x.try_into() })
+                .collect::<PyResult<Vec<TopicReply>>>()
+        })
+        .map(|b| b.unbind())
+    }
+
+    /// Post a reply to a community topic. Returns awaitable.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=create_topic_reply>
+    #[pyo3(signature = (topic_id, body, reply_to_id = None))]
+    fn create_topic_reply(
+        &self,
+        py: Python<'_>,
+        topic_id: String,
+        body: String,
+        reply_to_id: Option<String>,
+    ) -> PyResult<Py<PyAny>> {
+        let ctx = self.ctx.clone();
+        pyo3_async_runtimes::tokio::future_into_py(py, async move {
+            let v = ctx
+                .create_topic_reply(topic_id, CreateReplyOptions { body, reply_to_id })
+                .await
+                .map_err(ErrorNewType)?;
+            TopicReply::try_from(v)
+        })
+        .map(|b| b.unbind())
+    }
 }
diff --git a/python/src/content/mod.rs b/python/src/content/mod.rs
index 7c8b0c8f9..59aec4049 100644
--- a/python/src/content/mod.rs
+++ b/python/src/content/mod.rs
@@ -10,6 +10,7 @@ pub(crate) fn register_types(parent: &Bound<PyModule>) -> PyResult<()> {
     parent.add_class::<types::TopicAuthor>()?;
     parent.add_class::<types::TopicImage>()?;
     parent.add_class::<types::OwnedTopic>()?;
+    parent.add_class::<types::TopicReply>()?;
     parent.add_class::<context::ContentContext>()?;
     parent.add_class::<context_async::AsyncContentContext>()?;
     Ok(())
diff --git a/python/src/content/types.rs b/python/src/content/types.rs
index bf185ceee..a91853744 100644
--- a/python/src/content/types.rs
+++ b/python/src/content/types.rs
@@ -94,6 +94,32 @@ pub(crate) struct TopicItem {
     shares_count: i32,
 }
 
+/// A reply on a topic
+#[pyclass(skip_from_py_object)]
+#[derive(Debug, PyObject, Clone)]
+#[py(remote = "longbridge::content::TopicReply")]
+pub(crate) struct TopicReply {
+    /// Reply ID
+    id: String,
+    /// Topic ID this reply belongs to
+    topic_id: String,
+    /// Reply body (plain text)
+    body: String,
+    /// ID of the parent reply ("0" means top-level)
+    reply_to_id: String,
+    /// Author info
+    author: TopicAuthor,
+    /// Attached images
+    #[py(array)]
+    images: Vec<TopicImage>,
+    /// Likes count
+    likes_count: i32,
+    /// Nested replies count
+    comments_count: i32,
+    /// Created time
+    created_at: PyOffsetDateTimeWrapper,
+}
+
 /// News item
 #[pyclass(skip_from_py_object)]
 #[derive(Debug, PyObject, Clone)]
diff --git a/rust/src/blocking/content.rs b/rust/src/blocking/content.rs
index fedf63570..0baf9ccd0 100644
--- a/rust/src/blocking/content.rs
+++ b/rust/src/blocking/content.rs
@@ -6,7 +6,8 @@ use crate::{
     Config, Result,
     blocking::runtime::BlockingRuntime,
     content::{
-        ContentContext, CreateTopicOptions, MyTopicsOptions, NewsItem, OwnedTopic, TopicItem,
+        ContentContext, CreateReplyOptions, CreateTopicOptions, ListTopicRepliesOptions,
+        MyTopicsOptions, NewsItem, OwnedTopic, TopicItem, TopicReply,
     },
 };
 
@@ -55,4 +56,33 @@ impl ContentContextSync {
         self.rt
             .call(move |ctx| async move { ctx.news(symbol).await })
     }
+
+    /// Get full details of a topic by its ID
+    pub fn topic_detail(&self, id: impl Into<String>) -> Result<OwnedTopic> {
+        let id = id.into();
+        self.rt
+            .call(move |ctx| async move { ctx.topic_detail(id).await })
+    }
+
+    /// List replies on a topic
+    pub fn list_topic_replies(
+        &self,
+        topic_id: impl Into<String>,
+        opts: ListTopicRepliesOptions,
+    ) -> Result<Vec<TopicReply>> {
+        let topic_id = topic_id.into();
+        self.rt
+            .call(move |ctx| async move { ctx.list_topic_replies(topic_id, opts).await })
+    }
+
+    /// Post a reply to a topic
+    pub fn create_topic_reply(
+        &self,
+        topic_id: impl Into<String>,
+        opts: CreateReplyOptions,
+    ) -> Result<TopicReply> {
+        let topic_id = topic_id.into();
+        self.rt
+            .call(move |ctx| async move { ctx.create_topic_reply(topic_id, opts).await })
+    }
 }
diff --git a/rust/src/content/context.rs b/rust/src/content/context.rs
index abc71c9d3..092eea9f2 100644
--- a/rust/src/content/context.rs
+++ b/rust/src/content/context.rs
@@ -3,7 +3,10 @@ use std::sync::Arc;
 use longbridge_httpcli::{HttpClient, Json, Method};
 use serde::Deserialize;
 
-use super::types::{CreateTopicOptions, MyTopicsOptions, NewsItem, OwnedTopic, TopicItem};
+use super::types::{
+    CreateReplyOptions, CreateTopicOptions, ListTopicRepliesOptions, MyTopicsOptions, NewsItem,
+    OwnedTopic, TopicItem, TopicReply,
+};
 use crate::{Config, Result};
 
 struct InnerContentContext {
@@ -22,9 +25,9 @@ impl ContentContext {
         }))
     }
 
-    /// Get topics created by the current authenticated user
+    /// Get topics created by the current authenticated user.
     ///
-    /// Path: GET /v1/content/topics/mine
+    /// See: <https://open.longbridge.com/docs/api?op=list_my_topics>
     pub async fn my_topics(&self, opts: MyTopicsOptions) -> Result<Vec<OwnedTopic>> {
         #[derive(Debug, Deserialize)]
         struct Response {
@@ -43,9 +46,9 @@ impl ContentContext {
             .items)
     }
 
-    /// Create a new topic
+    /// Create a new community topic.
     ///
-    /// Path: POST /v1/content/topics
+    /// See: <https://open.longbridge.com/docs/api?op=create_topic>
     pub async fn create_topic(&self, opts: CreateTopicOptions) -> Result<String> {
         #[derive(Debug, Deserialize)]
         struct TopicId {
@@ -89,6 +92,85 @@ impl ContentContext {
             .items)
     }
 
+    /// Get full details of a topic by its ID.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=topic_detail>
+    pub async fn topic_detail(&self, id: impl Into<String>) -> Result<OwnedTopic> {
+        #[derive(Debug, Deserialize)]
+        struct Response {
+            item: OwnedTopic,
+        }
+
+        let id = id.into();
+        Ok(self
+            .0
+            .http_cli
+            .request(Method::GET, format!("/v1/content/topics/{id}"))
+            .response::<Json<Response>>()
+            .send()
+            .await?
+            .0
+            .item)
+    }
+
+    /// List replies on a topic.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=list_topic_replies>
+    pub async fn list_topic_replies(
+        &self,
+        topic_id: impl Into<String>,
+        opts: ListTopicRepliesOptions,
+    ) -> Result<Vec<TopicReply>> {
+        #[derive(Debug, Deserialize)]
+        struct Response {
+            items: Vec<TopicReply>,
+        }
+
+        let topic_id = topic_id.into();
+        Ok(self
+            .0
+            .http_cli
+            .request(
+                Method::GET,
+                format!("/v1/content/topics/{topic_id}/comments"),
+            )
+            .query_params(opts)
+            .response::<Json<Response>>()
+            .send()
+            .await?
+            .0
+            .items)
+    }
+
+    /// Post a reply to a community topic.
+    ///
+    /// See: <https://open.longbridge.com/docs/api?op=create_topic_reply>
+    pub async fn create_topic_reply(
+        &self,
+        topic_id: impl Into<String>,
+        opts: CreateReplyOptions,
+    ) -> Result<TopicReply> {
+        #[derive(Debug, Deserialize)]
+        struct Response {
+            item: TopicReply,
+        }
+
+        let topic_id = topic_id.into();
+        Ok(self
+            .0
+            .http_cli
+            .request(
+                Method::POST,
+                format!("/v1/content/topics/{topic_id}/comments"),
+            )
+            .body(Json(opts))
+            .response::<Json<Response>>()
+            .send()
+            .await?
+            .0
+            .item)
+    }
+
     /// Get news list
     pub async fn news(&self, symbol: impl Into<String>) -> Result<Vec<NewsItem>> {
         #[derive(Debug, Deserialize)]
diff --git a/rust/src/content/mod.rs b/rust/src/content/mod.rs
index bad07fbdd..aa038349d 100644
--- a/rust/src/content/mod.rs
+++ b/rust/src/content/mod.rs
@@ -5,5 +5,6 @@ mod types;
 
 pub use context::ContentContext;
 pub use types::{
-    CreateTopicOptions, MyTopicsOptions, NewsItem, OwnedTopic, TopicAuthor, TopicImage, TopicItem,
+    CreateReplyOptions, CreateTopicOptions, ListTopicRepliesOptions, MyTopicsOptions, NewsItem,
+    OwnedTopic, TopicAuthor, TopicImage, TopicItem, TopicReply,
 };
diff --git a/rust/src/content/types.rs b/rust/src/content/types.rs
index 0e8e5187a..3d3a04631 100644
--- a/rust/src/content/types.rs
+++ b/rust/src/content/types.rs
@@ -147,6 +147,64 @@ pub struct TopicItem {
     pub shares_count: i32,
 }
 
+/// Options for listing replies on a topic
+#[derive(Debug, Default, Clone, Serialize)]
+pub struct ListTopicRepliesOptions {
+    /// Page number (default 1)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub page: Option<i32>,
+    /// Records per page, range 1~50 (default 20)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub size: Option<i32>,
+}
+
+/// Options for posting a reply to a topic
+#[derive(Debug, Clone, Serialize)]
+pub struct CreateReplyOptions {
+    /// Reply body. Plain text only — Markdown is not rendered.
+    ///
+    /// Stock symbols mentioned in the body (e.g. `700.HK`, `TSLA.US`) are
+    /// automatically recognized and linked as related stocks by the platform.
+    /// Use `tickers` in the parent topic to associate additional stocks not
+    /// mentioned in the body.
+    pub body: String,
+    /// ID of the reply to. Set to `None` to post a top-level reply.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub reply_to_id: Option<String>,
+}
+
+/// A reply on a topic
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TopicReply {
+    /// Reply ID
+    pub id: String,
+    /// Topic ID this reply belongs to
+    pub topic_id: String,
+    /// Reply body (plain text)
+    #[serde(default)]
+    pub body: String,
+    /// ID of the parent reply (`"0"` means top-level)
+    #[serde(default)]
+    pub reply_to_id: String,
+    /// Author info
+    pub author: TopicAuthor,
+    /// Attached images
+    #[serde(default)]
+    pub images: Vec<TopicImage>,
+    /// Likes count
+    #[serde(default)]
+    pub likes_count: i32,
+    /// Nested replies count
+    #[serde(default)]
+    pub comments_count: i32,
+    /// Created time
+    #[serde(
+        serialize_with = "time::serde::rfc3339::serialize",
+        deserialize_with = "serde_utils::timestamp::deserialize"
+    )]
+    pub created_at: OffsetDateTime,
+}
+
 /// News item
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct NewsItem {