diff --git a/Mahjong/Table.cpp b/Mahjong/Table.cpp
index 69c326e..2a41681 100644
--- a/Mahjong/Table.cpp
+++ b/Mahjong/Table.cpp
@@ -143,13 +143,9 @@ void Table::init_before_playing()
 			players[2].score,
 			players[3].score,
 		};
-		FILE* fp = fopen(write_log_filename.c_str(), "w+");
-		fprintf(fp, "Table table;\ntable.game_init_for_replay(%s, %s, %d, %d, %d, %d);\n",
-			vec2str(yama_log).c_str(),
-			vec2str(init_score).c_str(),			
-			n立直棒, n本场, 场风, 庄家);
-
-		fclose(fp);
+		log_buffer_prefix = fmt::format("Table table;\ntable.game_init_for_replay({}, {}, {}, {}, {}, {});\n",
+			vec2str(yama_log), vec2str(init_score),	n立直棒, n本场, 场风, 庄家);
+		selection_log.reserve(512); // avoid reallocation
 	}
 
 	from_beginning();
@@ -746,9 +742,10 @@ void Table::make_selection(int selection)
 #endif
 	// 这个地方控制了游戏流转
 	if (write_log) {
-		FILE* fp = fopen(write_log_filename.c_str(), "a+");
+		/*FILE* fp = fopen(write_log_filename.c_str(), "a+");
 		fprintf(fp, "\ntable.make_selection(%d);", selection);
-		fclose(fp);
+		fclose(fp);*/
+		selection_log.push_back(selection);
 	}
 	// 分为两种情况，如果是ACTION阶段
 	switch (phase) {
diff --git a/Mahjong/Table.h b/Mahjong/Table.h
index 943654e..a6893c9 100644
--- a/Mahjong/Table.h
+++ b/Mahjong/Table.h
@@ -7,6 +7,7 @@
 #include "GameResult.h"
 #include "macro.h"
 #include "Player.h"
+#include "fmt/os.h"
 #include <array>
 
 namespace_mahjong
@@ -34,14 +35,18 @@ class Table
 	int turn = 0;
 	BaseAction last_action = BaseAction::出牌;
 	Wind 场风 = Wind::East;
-	int 庄家 = 0; // 庄家
+	int 庄家 = 0;
 	int n本场 = 0;
 	int n立直棒 = 0;
 	GameLog fullGameLog;
 
+	/* For debug */
 	bool write_log = false;
-	std::string write_log_filename = "replay.log";
 	std::vector<int> yama_log;
+	std::string log_buffer_prefix;
+	std::vector<int> selection_log;
+
+	/* Set seed (set_seed) before init*/
 	bool use_seed = false;
 	int seed = 0;
 
@@ -85,6 +90,22 @@ class Table
 		use_seed = true; 
 	}
 	// inline int get_seed() { return seed; }
+	inline std::string get_debug_replay()
+	{
+		std::string ret;
+		ret += fmt::format("{}", log_buffer_prefix);
+		for (auto selection : selection_log) {
+			ret += fmt::format("table.make_selection({});\n", selection);
+		}
+		return ret;
+	}
+	inline void print_debug_replay()
+	{
+		fmt::print("{}", log_buffer_prefix);
+		for (auto selection : selection_log) {
+			fmt::print("table.make_selection({});\n", selection);
+		}
+	}
 
 	enum ToStringOption : int {
 		YAMA = 1 << 0,
diff --git a/MahjongPyWrapper/MahjongPy.cpp b/MahjongPyWrapper/MahjongPy.cpp
index 911aa74..ae082ad 100644
--- a/MahjongPyWrapper/MahjongPy.cpp
+++ b/MahjongPyWrapper/MahjongPy.cpp
@@ -184,8 +184,10 @@ PYBIND11_MODULE(MahjongPyWrapper, m)
 		.def("get_result", &Table::get_result)
 		.def("get_self_actions", &Table::get_self_actions)
 		.def("get_response_actions", &Table::get_response_actions)
-		.def("set_write_log", &Table::set_write_log)
 		.def("set_seed", &Table::set_seed)
+		.def("set_write_log", &Table::set_write_log)
+		.def("print_debug_replay", &Table::print_debug_replay)
+		.def("get_debug_replay", &Table::get_debug_replay)
 
 		// 成员变量们
 		.def_readonly("dora_spec", &Table::dora_spec)