Can't go beyond
It is an idiom, pronounced x í NGB ù y ú f ā ng, which means that actions do not go beyond the law and actions do not go beyond the right way.
explain
Action does not go beyond the law, behavior does not go beyond the right way.
source
"On the biography of ban Biao in the book of the later Han Dynasty:" ban Biao used to be a good scholar and a talented person. He could not overstep the dangerous and chaotic situation. He did not lose his right words. He did not rush to be an official. He did not disobey others. He applied Wenhua to the national code and kept his humble position
Can't go beyond
Break the family for the country - pò jiā wéi guó
stand by watching others battle - zuò bì shàng guān
be faithful to one 's husband unto death - cóng yī ér zhōng