Open mahjong machine's desktop, and there is a table at the back. Then the position of the switch on the mahjong machine has a number. Just turn off the power supply and reset after adjustment. First, determine how many Dun cards you play, Chengdu Mahjong 108, playing 13 and 14 Dun. Look for the game schedule, and see the number of gears corresponding to 108, 13, 14, 14, for example, 19. Find the digital switch. Generally, the digital switch is in two places, next to the power switch, and the opening panel is in the small column on the left hand side.

After finding it, directly press the corresponding addition and subtraction keys to adjust to the corresponding gear. Finally, to reset, just press and hold the two lifting keys at the same time or shut down and restart. Different mahjong machine uses different programs, and the specific gear should be based on the program table used by your own machine.