If you haven’t seen the moment that Jingliang blatantly gouged Jake Matthew’s eyes in an attempt to escape a guillotine at UFC 221, go take a look.
Jingliang puts both hands on Matthews’ face, and digs his fingers into Matthews’ eyes. The foul appears to open a cut on Matthews’ eyelid, and his vision was blurred. The referee didn’t even stop the action, despite being right above the foul as it happened. Instead, he let it continue, Jingliang escaped the guillotine, and the official simply warned him not to commit another foul between rounds.