Unfortunately, I do not speak/read chinese either.
I did run it through Google Translate and this is what I got:
Description of Board
Debugging puping 0.5K resistor is disconnected palette of 100 ohm resistor adjustable output to zero.
1 ok so adjustable palette of 0.22ohm resistor voltage drop is 100 mv.
10.5K resistor connected to disconnected.
When I searched the above, I came back with the following.
M-9 testing:
1. first of all, please solder the 10.5kohm resistor with * on pcb to make it open circuit
2. adj W2 100 Ohm VR to make the mid point voltage to 0V
3. adj W1 10K Ohm VR in order to make the 0.22Ohm resistor 's voltage drop as 100mV
4. at the end, reconnect the 10.5K Ohm with solder gun.