Under Cover(2017)

Under Cover is a Chinese crime drama following police officer Bao Yu, who infiltrates a major drug cartel by posing as a subordinate to dealer Jin Fei. His breakthrough comes when he befriends Tang Guo, the daughter of the cartel's ruthless leader Tian Jing, gaining access to the inner circle. Bao Yu doesn't work alone—he's supported by fellow undercover operative Guan Xiao Zhi, his romantic interest, along with police chief Fang Qing Long and anti-narcotics team leader Lian Zhong. As Bao Yu navigates the dangerous world of organized crime, he must balance his cover identity with his loyalty to the law, risking exposure at every turn while dismantling the cartel from within.