diff --git a/protos/device_state.proto b/protos/device_state.proto
index 0b1ac5f..4f61955 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -452,7 +452,7 @@ message MkxJState {
 message BaliseState {
   uint32 id = 1;
   graphicData.KilometerSystem km = 2; //当前公里标
-  bytes telegram = 3; //当前报文
+  string telegram = 3; //当前报文（16进制字符串）
 }
 
 ////////////////////////////////////////////////////////////////////////////