n	simplified	traditional	pinyin	meaning
1	谢谢	謝謝	xie4 xie5	1: thanks
2	不	不	bu4	"1: no; not so
2: (bound form) not; un-"
3	不客气	不客氣	bu4 ke4 qi5	"1: you're welcome
2: don't mention it
3: impolite
4: rude
5: blunt"
4	再见	再見	zai4 jian4	1: goodbye