Some words in the English language are called 'contranyms', where depending on the context, the same word can have very opposite meanings.
For example:
leave - to go away from a certain place, but can also mean, to remain or stay (so you can see these two 'opposite' meanings).
sanction - to threaten some penalty, but can also mean, to give permission.
I was wondering if the Chinese language has examples of contranyms (you can perhaps include slang or modern usages).