Third update,
...
Qin Fang actually never intended to go into real industry. He didn't have the prowess, nor the capital, at least it wasn't his goal in the near future.
He hadn't mentioned this to Tang Feifei, and he certainly wouldn't tell Chen Jiangnan. He would just let them fuss over it while he waited for the laboratory to fall into his lap.
As for what he told Tang Feifei about being cautious of Chen Jiangnan's empty promises, it wasn't entirely untrue. He figured that it was very likely Chen Jiangnan would pull something like that, so he decided to beat him at his own game and take something from him first.
Even if Chen Jiangnan ended up attempting to swindle him, Qin Fang had the technology, and he wouldn't miss out on the profits. Otherwise, he wouldn't let Chen Jiangnan take advantage of the situation without getting something in return.
"Why are they here?"