Master, Wait a Moment

A rookie cop has gone undercover without the knowledge of the deputy captain of the police. They are pushed into opposite camps due to misunderstanding, thus marking the start of a cat-and-mouse game.
Master and apprentice begin in their hot-blooded journey to fighting crime when the lone cold ranger meets the "little fresh meat." Xu Wu Shuang, a detective in his thirties, heads up the criminal division of the Suicheng police department. He is extremely rational and would strike without hesitation once he has his sights set on a target.
Meanwhile, rookie cop Wang Dai Yu has the heart to do well, yet things do not always work out. He goes by the book too much and has a much soft personality. Being a fuerdai, he could have inherited his family's riches yet chose to be a public servant.
(Source: ChineseDrama.info)