phrase, idiomatic
to know the rule, but break it anyway (syn.) 明知故犯
他明知是必須這樣做，但他不願意做，他知規犯規！
他明知是必须这样做，但他不愿意做，他知规犯规！
tā míng zhī shì bì xū zhè yàng zuò ， dàn tā bù yuàn yì zuò ， tā zhī guī fàn guī ！ He already knows that it's necessary to do that, but he doesn't want to do it, so he already knows the rule, but he breaks it anyway!
Examples (Wiktionary)
Mandarin
他明知是必须这样做，但他不愿意做，他知规犯规！
他明知是必須這樣做，但他不願意做，他知規犯規！
tā míng zhī shì bì xū zhè yàng zuò ， dàn tā bù yuàn yì zuò ， tā zhī guī fàn guī ！
He already knows that it's necessary to do that, but he doesn't want to do it, so he already knows the rule, but he breaks it anyway!