Zhao Tiezhu combined with the information given by Xiao Qi. He could probably guess Xu Yan's idea about what was inside. This is why Zhao Tiezhu thinks Xu Yan is suicide. It's impossible for Xu Yan to always prepare these things.

You know from the data, Xu Yan is very impatient to prepare, even did not have a good selection, so Zhao Tiezhu is more and more convinced of his own thoughts.

Zhao Tiezhu looked at Xu Long with a firm look on his face at this time, and immediately wondered whether he should be admired for Xu Long's heart of childhood or feel helpless for his spirit of fearlessness...