(slang) pretext of needing to urinate (used to slip away to avoid having to do sth)

to escape; to disappear

to vanish; to hide; to cover one's traces

to disappear from view; to live in seclusion

Qimen Dunjia, an ancient system of occult arts used for divination and strategic planning

to take refuge in religious life

to flee at hearing the news (idiom)