C991 Dark struggle
The Zen Master Gyokuro and Zhen Hui Zhu were definitely the Earth Immortal experts who had used all sorts of methods to protect the passenger plane. This should be certain.
What he could not confirm was that out of the more than 20 Buddhist and two-pronged mages that followed them, was there anyone else who had reached such a level? If it's only two land immortals, they can't shake our dominance