Cheng Zhi

Cheng Zhi was Head of Security at the Chinese Consulate in Los Angeles.

Day 4
Cheng Zhi headed up the investigation into the assault on the Chinese Consulate, during which Lee Jong was captured, and Consul Koo Yin was killed by friendly fire. After seeing the face of CTU Agent Howard Bern on surveillance footage, Cheng confronted CTU, demanding answers. Cheng later intercepted Bern when he was moved to San Diego. Under threat of deportation to China, Cheng made Bern point out Jack Bauer as the person responsible for the assault on the consulate.

Day 5
During the last hour of Day 5, Chinese operatives working for Cheng kidnapped Jack Bauer and placed him in a freighter headed for China. Cheng assured Bauer that he was not going to kill him, because Bauer was "too valuable to kill".