diff --git a/core/src/component.rs b/core/src/component.rs
index 9d4ce13..ee39f4f 100644
--- a/core/src/component.rs
+++ b/core/src/component.rs
@@ -1,9 +1,13 @@
 use std::{
     any::TypeId,
+    collections::HashMap,
     ops::{Deref, DerefMut},
 };
 
-use crate::net::NetSync;
+use bytes::Bytes;
+use tracing::{trace_span, warn};
+
+use crate::net::{Decode, Encode, NetSync};
 
 /// Represents a type of component that can be attached
 /// on [`Components`].
@@ -18,28 +22,33 @@ pub trait Attach {
 }
 
 pub struct Components {
-    components: std::collections::HashMap<crate::Id, (Box<dyn Attach + Send + Sync>, TypeId)>,
+    components: HashMap<crate::Id, (Box<dyn Attach + Send + Sync>, TypeId)>,
 }
 
 impl Components {
     pub fn new() -> Self {
         Self {
-            components: std::collections::HashMap::new(),
+            components: HashMap::new(),
         }
     }
 
-    pub fn attach<T>(&mut self, id: crate::Id, mut component: T)
+    #[inline]
+    pub fn builder() -> ComponentsBuilder {
+        ComponentsBuilder { inner: Self::new() }
+    }
+
+    pub fn attach<T>(&mut self, id: crate::Id, component: T)
     where
         T: Attach + Send + Sync + 'static,
     {
-        if self.components.contains_key(&id) {
-            panic!("component with id {id} already exist in this components!");
-        }
-
-        component.on_attach(self);
+        assert!(
+            !self.components.contains_key(&id),
+            "component with id {id} already exist in this components!"
+        );
 
-        self.components
-            .insert(id, (Box::new(component), TypeId::of::<T>()));
+        let mut boxed = Box::new(component);
+        boxed.on_attach(self);
+        self.components.insert(id, (boxed, TypeId::of::<T>()));
     }
 
     pub fn get<T>(&self, id: &crate::Id) -> Option<&T>
@@ -79,13 +88,201 @@ impl Components {
     }
 }
 
-pub struct Synced<T>(pub T)
+impl Encode for Components {
+    fn encode<B>(&self, buf: &mut B) -> anyhow::Result<()>
+    where
+        B: bytes::BufMut,
+    {
+        let Component(event) =
+            self.get::<Component<
+                crate::Event<dyn Fn(&mut HashMap<crate::Id, Bytes>) -> anyhow::Result<()>>,
+            >>(NET_SEND_ID.deref())
+                .expect("net send event component not found");
+
+        let mut hashmap = HashMap::new();
+        event.invoker()(&mut hashmap)?;
+        hashmap.encode(buf)
+    }
+}
+
+impl NetSync for Components {
+    fn read_buf<B>(&mut self, buf: &mut B) -> anyhow::Result<()>
+    where
+        B: bytes::Buf,
+    {
+        let Component(event) =
+            self.get::<Component<
+                crate::Event<dyn Fn(&mut HashMap<crate::Id, Bytes>) -> anyhow::Result<()>>,
+            >>(NET_SEND_ID.deref())
+                .expect("net recv event component not found");
+
+        let mut hashmap = HashMap::<crate::Id, Bytes>::decode(buf)?;
+        event.invoker()(&mut hashmap)
+    }
+}
+
+pub struct ComponentsBuilder {
+    inner: Components,
+}
+
+impl ComponentsBuilder {
+    pub fn net_sync(mut self) -> Self {
+        self.inner
+            .attach(net_send_event_comp_id(), net_send_event_comp());
+        self.inner
+            .attach(net_recv_event_comp_id(), net_recv_event_comp());
+        self
+    }
+
+    #[inline]
+    pub fn build(self) -> Components {
+        self.inner
+    }
+}
+
+impl Into<Components> for ComponentsBuilder {
+    fn into(self) -> Components {
+        self.build()
+    }
+}
+
+pub struct Component<T>(pub T);
+
+impl<T> Attach for Component<T> {
+    fn on_attach(&mut self, _components: &mut Components) {}
+}
+
+impl<T> Deref for Component<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<T> DerefMut for Component<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+static NET_SEND_ID: once_cell::sync::Lazy<crate::Id> =
+    once_cell::sync::Lazy::new(net_send_event_comp_id);
+static NET_RECV_ID: once_cell::sync::Lazy<crate::Id> =
+    once_cell::sync::Lazy::new(net_recv_event_comp_id);
+
+pub struct Synced<T>(pub T, pub crate::Id)
 where
-    T: Attach + NetSync;
+    T: Attach + NetSync + 'static;
 
 impl<T> Attach for Synced<T>
 where
-    T: Attach + NetSync,
+    T: Attach + NetSync + 'static,
+{
+    fn on_attach(&mut self, components: &mut Components) {
+        self.0.on_attach(components);
+
+        let ptr = self as *mut Self;
+
+        let span = trace_span!(
+            "attach synced component",
+            comp_type = std::any::type_name::<T>()
+        );
+
+        let _ = span.enter();
+
+        if let Some(Component(event)) = components.get_mut::<Component<
+            crate::Event<dyn Fn(&mut HashMap<crate::Id, Bytes>) -> anyhow::Result<()>>,
+        >>(NET_SEND_ID.deref())
+        {
+            event.register(Box::new(move |map| {
+                let this = unsafe { &*ptr };
+
+                map.insert(this.1.clone(), {
+                    let mut bytes_mut = bytes::BytesMut::new();
+                    this.0.encode(&mut bytes_mut)?;
+
+                    bytes_mut.into()
+                });
+
+                Ok(())
+            }))
+        } else {
+            warn!("network sending event not found");
+        }
+
+        if let Some(Component(event)) = components.get_mut::<Component<
+            crate::Event<dyn Fn(&mut HashMap<crate::Id, Bytes>) -> anyhow::Result<()>>,
+        >>(NET_RECV_ID.deref())
+        {
+            event.register(Box::new(move |map| {
+                let this = unsafe { &mut *ptr };
+                let mut bytes = map.insert(this.1.clone(), Bytes::new()).unwrap();
+
+                this.0.read_buf(&mut bytes)
+            }))
+        } else {
+            warn!("network receiving event not found");
+        }
+    }
+}
+
+impl<T> Deref for Synced<T>
+where
+    T: Attach + NetSync + 'static,
 {
-    fn on_attach(&mut self, components: &mut Components) {}
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<T> DerefMut for Synced<T>
+where
+    T: Attach + NetSync + 'static,
+{
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+/// Creates a new event that handle network packet buf sending mapping,
+/// which component id is `core:net_send`.
+pub fn net_send_event_comp(
+) -> Component<crate::Event<dyn Fn(&mut HashMap<crate::Id, Bytes>) -> anyhow::Result<()>>> {
+    Component(crate::Event::new(|listeners| {
+        Box::new(move |map| {
+            for listener in listeners {
+                listener(map)?;
+            }
+
+            Ok(())
+        })
+    }))
+}
+
+#[inline]
+pub fn net_send_event_comp_id() -> crate::Id {
+    crate::Id::new("core", "net_send".to_string())
+}
+
+/// Creates a new event that handle network packet buf receiving mapping,
+/// which component id is `core:net_recv`.
+pub fn net_recv_event_comp(
+) -> Component<crate::Event<dyn Fn(&mut HashMap<crate::Id, Bytes>) -> anyhow::Result<()>>> {
+    Component(crate::Event::new(|listeners| {
+        Box::new(move |map| {
+            for listener in listeners {
+                listener(map)?;
+            }
+
+            Ok(())
+        })
+    }))
+}
+
+#[inline]
+pub fn net_recv_event_comp_id() -> crate::Id {
+    crate::Id::new("core", "net_recv".to_string())
 }
diff --git a/core/src/net/mod.rs b/core/src/net/mod.rs
index 18fe24a..a2cd01e 100644
--- a/core/src/net/mod.rs
+++ b/core/src/net/mod.rs
@@ -24,13 +24,6 @@ pub trait NetSync: Encode {
     fn read_buf<B>(&mut self, buf: &mut B) -> anyhow::Result<()>
     where
         B: bytes::Buf;
-
-    fn write_buf<B>(&self, buf: &mut B) -> anyhow::Result<()>
-    where
-        B: bytes::BufMut,
-    {
-        self.encode(buf)
-    }
 }
 
 impl<T> NetSync for T
@@ -59,6 +52,26 @@ mod packet_buf_imp {
 
     use super::*;
 
+    impl Encode for bytes::Bytes {
+        fn encode<B>(&self, buf: &mut B) -> anyhow::Result<()>
+        where
+            B: bytes::BufMut,
+        {
+            self.slice(..).encode(buf)
+        }
+    }
+
+    impl<'de> Decode<'de> for bytes::Bytes {
+        type Output = bytes::Bytes;
+
+        fn decode<B>(buf: &'de mut B) -> anyhow::Result<Self::Output>
+        where
+            B: bytes::Buf,
+        {
+            Vec::<u8>::decode(buf).map(bytes::Bytes::from)
+        }
+    }
+
     impl Encode for u8 {
         fn encode<B>(&self, buf: &mut B) -> anyhow::Result<()>
         where