[经] strict perfomance of contract

yán gé zūn shǒu hé tóng tiáo kuǎn ㄧㄢˊ ㄍㄜˊ ㄗㄨㄣ ㄕㄡˇ ㄏㄜˊ ㄊㄨㄥˊ ㄊㄧㄠˊ ㄎㄨㄢˇ