After multiple discussions and tests with the manufacturer,

if anyone else encounters the same problem I did—where the initial power (hash rate) is insufficient and can’t reach 110W

—try removing the heatsink.
If possible,
when reinstalling the six screws,
avoid over-tightening; 0.35N·m is the maximum

(based on my own testing, a light torque is enough).

For the other two separate screws, don’t exceed 0.25N·m.

Both over-tightening and under-tightening can cause insufficient wattage.