diff --git a/src/struct_pb/protoc-plugin/example/zpointcloud.cpp b/src/struct_pb/protoc-plugin/example/zpointcloud.cpp
index 6ba4308e3..d1ade31ed 100644
--- a/src/struct_pb/protoc-plugin/example/zpointcloud.cpp
+++ b/src/struct_pb/protoc-plugin/example/zpointcloud.cpp
@@ -27,11 +27,11 @@ ::inner_class::ZPointCloudXYZIT StructToClass(inner_struct::sp_cZPointCloudXYZIT
 // ClassToStruct declaration
 inner_struct::spZPointCloudXYZIT ClassToStruct(::inner_class::ZPointCloudXYZIT const& in) {
   ::inner_struct::spZPointCloudXYZIT result = std::make_shared<inner_struct::ZPointCloudXYZIT>();
-  pcl::PointCloud<pcl::PointXYZIT>::Ptr pc_result = result; // stupid code , need solve
   *(std::shared_ptr<::inner_struct::ZFrame>)result = ClassToStruct(in.header());
   // 解压点云
   std::stringstream compressed_pcl_pointcloud(in.pcl_compressed_pc());
-  s_compress.decodePointCloud(compressed_pcl_pointcloud, pc_result);
+  // decodePointCloud 的参数定义成了智能指针的引用, 所以不能存在转换. 只有是 const T& 和 std::shared_ptr<T>, 可以使用多态,即直接使用子类对象或者子类智能指针
+  s_compress.decodePointCloud(compressed_pcl_pointcloud, (pcl::PointCloud<pcl::PointXYZIT>::Ptr&)result);
 
   return result;
 }
diff --git a/src/struct_pb/protoc-plugin/example/zpointcloud.hpp b/src/struct_pb/protoc-plugin/example/zpointcloud.hpp
index ef54aa1a7..259aff6ef 100644
--- a/src/struct_pb/protoc-plugin/example/zpointcloud.hpp
+++ b/src/struct_pb/protoc-plugin/example/zpointcloud.hpp
@@ -12,8 +12,13 @@
 
 namespace inner_struct {
 
+// template <typename _PointType>
+// struct ZPointCloud : public ZFrame, public pcl::PointCloud<_PointType> {
+
+// };
+
 template <typename _PointType>
-struct ZPointCloud : public ZFrame, public pcl::PointCloud<_PointType> {
+struct ZPointCloud :  public pcl::PointCloud<_PointType>, public ZFrame {
 
 };