diff --git a/paddle/capi/Arguments.cpp b/paddle/capi/Arguments.cpp
index 60bdea15ae76d3d977c15ef87172e3aacaf793f5..678a80ac3f4d5ca5aa3321d0b089fe5a8c465af1 100644
--- a/paddle/capi/Arguments.cpp
+++ b/paddle/capi/Arguments.cpp
@@ -72,4 +72,37 @@ int PDArgsGetIds(PD_Arguments args, uint64_t ID, PD_IVector ids) {
   iv->vec = a->args[ID].ids;
   return kPD_NO_ERROR;
 }
+
+int PDArgsSetIds(PD_Arguments args, uint64_t ID, PD_IVector ids) {
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
+}
+
+int PDArgsSetSequenceStartPos(PD_Arguments args,
+                              uint64_t ID,
+                              PD_IVector seqPos) {
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
+}
+
+int PDArgsSetSubSequenceStartPos(PD_Arguments args,
+                                 uint64_t ID,
+                                 PD_IVector subSeqPos) {
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
+}
+
+int PDArgsGetSequenceStartPos(PD_Arguments args,
+                              uint64_t ID,
+                              PD_IVector seqPos) {
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
+}
+
+int PDArgsGetSubSequenceStartPos(PD_Arguments args,
+                                 uint64_t ID,
+                                 PD_IVector subSeqPos) {
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
+}
 }
diff --git a/paddle/capi/PaddleCAPI.h b/paddle/capi/PaddleCAPI.h
index 4819be3447f41ee30ffb1b50828f23492b84d2ef..6eea60ef749152a2a69c68874ffc1156cb1b81ae 100644
--- a/paddle/capi/PaddleCAPI.h
+++ b/paddle/capi/PaddleCAPI.h
@@ -51,6 +51,19 @@ typedef void* PD_IVector;
 
 PD_API int PDIVecCreateNone(PD_IVector* ivec);
 
+/**
+ * @brief PDIVectorCreate create a paddle int vector
+ * @param [out] ivec: output int vector.
+ * @param [in] array: input array.
+ * @param [in] size: input array size.
+ * @param [in] copy: memory copy or just use same memory. True if copy.
+ * @return PD_Error
+ */
+PD_API int PDIVectorCreate(PD_IVector* ivec,
+                           int* array,
+                           uint64_t size,
+                           bool copy);
+
 PD_API int PDIVecDestroy(PD_IVector ivec);
 
 PD_API int PDIVectorGet(PD_IVector ivec, int** buffer);
@@ -99,6 +112,23 @@ PD_API int PDArgsGetValue(PD_Arguments args, uint64_t ID, PD_Matrix mat);
 
 PD_API int PDArgsGetIds(PD_Arguments args, uint64_t ID, PD_IVector ids);
 
+PD_API int PDArgsSetIds(PD_Arguments args, uint64_t ID, PD_IVector ids);
+
+PD_API int PDArgsSetSequenceStartPos(PD_Arguments args,
+                                     uint64_t ID,
+                                     PD_IVector seqPos);
+
+PD_API int PDArgsGetSequenceStartPos(PD_Arguments args,
+                                     uint64_t ID,
+                                     PD_IVector seqPos);
+
+PD_API int PDArgsSetSubSequenceStartPos(PD_Arguments args,
+                                        uint64_t ID,
+                                        PD_IVector subSeqPos);
+
+PD_API int PDArgsGetSubSequenceStartPos(PD_Arguments args,
+                                        uint64_t ID,
+                                        PD_IVector subSeqPos);
 /**
  * @brief GradientMachine means a neural network.
  */
diff --git a/paddle/capi/Vector.cpp b/paddle/capi/Vector.cpp
index eb3501fb5b8ff6f725c4fda4cd3bf68a520698ed..a2e6f3507de3d1fcc3693bf6fce42e8ed5991644 100644
--- a/paddle/capi/Vector.cpp
+++ b/paddle/capi/Vector.cpp
@@ -26,6 +26,11 @@ int PDIVecCreateNone(PD_IVector* ivec) {
   return kPD_NO_ERROR;
 }
 
+int PDIVectorCreate(PD_IVector* ivec, int* array, uint64_t size, bool copy) {
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
+}
+
 int PDIVecDestroy(PD_IVector ivec) {
   if (ivec == nullptr) return kPD_NULLPTR;
   delete cast<paddle::capi::CIVector>(ivec);
@@ -41,12 +46,12 @@ int PDIVectorGet(PD_IVector ivec, int** buffer) {
 }
 
 int PDIVectorResize(PD_IVector ivec, uint64_t size) {
-  // TODO(lizhao): Complete this method.
-  return 0;
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
 }
 
 int PDIVectorGetSize(PD_IVector ivec, uint64_t* size) {
-  // TODO(lizhao): Complete this method.
-  return 0;
+  //! TODO(lizhao): Complete this method.
+  return kPD_UNDEFINED_ERROR;
 }
 }