Operation method
The other party will give a "Q" if we give a "7" first, and the other party will not give a "K" after we give a "K" suppression.
Our side will issue "4", the other side will issue "5", and we will issue "J" to suppress.
The other party will open the "A" to suppress, and we will play the king again.
After hitting "6" and "8", hit "J" for the last stop.