Hua Qiudao can face Zhou Yan, but Zhou Yan cannot face Hua Qiudao.
Hua Qiudao has already begun to undergo some changes, which Hua Qiudao himself is unaware of. Even if Zhou Yan mentions it, Hua Qiudao would still not believe it; instead, it would further accelerate Hua Qiudao's transformation.
If, before this, Zhou Yan was merely very confident in the results of his deductions, now, after seeing Hua Qiudao and witnessing him obtain the inheritance of the Ten Thousand Immortals and Ten Thousand Buddhas, Zhou Yan is completely certain of the ultimate truth of his deductions, leaving no room for luck.
In other words, the mantis's fake death deceived everyone who sacrificed for the Nine Origin Reincarnation.
