yán guī zhèng zhuàn
to return to the topic (idiom)
to get back to the main point
gǎi xié guī zhèng
to mend one's ways (idiom)
to turn over a new leaf
qì xié guī zhèng
to give up evil and return to virtue
guī zhèng
to return to the right path
to mend one's ways
to reform
Reformed (church etc)