Cheng Sinzan is a wealthy businessman and part time fighter.
Cheng is a fight promoter for a match between Muay Thai champion Joe Higashi and American Wrestling Champion Big Bear (formerly Raiden). Cheng neglected to inform Joe that the match would take place in an electrified ring. Joe tries to back out of the fight but Cheng turns on the electricity. While Big Bear has Joe in a head lock Bear passes on the news that Terry has been defeated by Wolfgang Krauser. Joe escapes the hold, and Tiger Uppercuts the large wrestler into the the electrified ropes. Clearing the ring, Cheng threatens to force Joe back into the match but Joe just punches Cheng into the ring and departs. (Note: this scene was not included in the original Japanese airing or US releases. It is a hidden scene on US DVD's).
Cheng is at a expedition in Egypt and finds one of the six pieces of Gaudaumus' armor, the Armor of Mars. He is immediately attacked by Panni, Jamin and Hauer but manages to escape. However Laocorn Gaudeamus is down the road and stops him. Cheng tries to fight his way past Laocorn but is swiftly defeated. Laocorn then takes the armor piece and adds it to his own. Cheng is then fitted with a mask and sent to retrieve Laocorn's sister, Sulia. He face Big Bear and quickly dispatches him. He is then challenged by Kim Kaphwan who after a lengthy fight shatters the mask releasing Cheng from Laocorn's control.
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