Zheng knew he would be among the top members of team Celestial if he joined since he was already at the third stage. From the information God gave him, there were only four people who reached the third stage and higher among all teams excluding team Devil. He was one of them, so even if he was to join team Celestial, he had the power to rival anyone in the team. Of course there was also the possibility that other people exchanged high ranked enhancements.
He could not deny the fact that he would have a higher chance of surviving if he joined. However, that would mean team China needed to repeat the movies or team battles with a new Guide to choose a leader again. The best outcome was few surviving at the cost of many and the worst was a wipe.
