Not much is known about Zhejiang. All is known is that he's from China and an officer of the HRL up to AD 2307. After the UN Forces united to become the ESF (AD 2310), Zhejiang transferred into the ESF-Army and eventually into A-Laws (AD 2311).
A-Laws' search and destroy mission called forth the full attention of all their forces to destroy Celestial Being. Field commander Kati Mannequin, anticipated that Celestial Being's mothership can launch into space. Commander Mannequin had Captain Revive Revival use GNZ-003 Gadessa's GN Mega Launcher to alter the direction of Ptolemy's atmospheric exit sequence, right into Zhejiang's A-Laws Battlecruiser. Zhejiang intercepted Ptolemaios 2 once its Trans Am boost into space was complete. His cruiser and mobile suits fired upon Ptolemy II. Unfortunately for Zhejiang, 00 Gundam was pre-launched before fully entering space. Zhejiang didn't expect CB to make this move and paid with his life. 00 Gundam fired two cutting-beams right into the command bridge of Zhejiang's cruiser, killing him in the process.