ㄧㄡˇyǒuㄊㄡˊtóuㄧㄡˇyǒuㄨㄟˇwěi

  1. 形容做事貫徹始終朱子語錄··公冶長》:斐然成章也是自成一家做得有頭有尾。」全始全終善始善終有始有終虎頭蛇尾有頭無尾有始無終

where there's a start, there's a finish (idiom)​; to finish once one starts sth, to carry things through, I started, so I'll finish.