Love in the Courtyard: a Stupid Pillar Turns into a Wise Pillar

He Yuzhu is no longer a "silly pillar", but a "wise pillar" - easy-going on the surface, but in fact thoughtful and retributive. He possesses the skills of a top chef in a steel rolling mill and secretly learns mechanical maintenance technology. He is a hidden technical boss. He adheres to the principle of "I won't offend others unless they offend me, and if they offend me, I'll repay him twice as much". He helps those who treat him sincerely and shows no mercy to those who plot against him.