There are four cards of water and fish, and the size comparison rules of both sides' cards.

1. The ratio of Party A’s last card to Party B’s last card, and the ratio of Party A’s first card to Party B’s first card are commonly known as “big to big ratio, small to small ratio”. It should be noted that the four cards only refer to the first and last cards, and have nothing to do with the left and right order of the two sets of cards you arrange on the table.

For example, even if Party A places the first card on the left and the last card on the right, Party B places the first card on the right and the last card on the left, Party A's first card on the left still has to be compared with Party B's first card on the right. , the tail card placed by Party A on the right is compared to the tail card placed by Party B on the left. This is the ratio between big and big, small and small. It has nothing to do with the order in which the cards are placed on the table. This is a combination, not an arrangement.

2. Four size determinations.

A. If Party A’s last card and first card are both greater than Party B’s (see point 3), then Party A is bigger.

B. If Party A’s last card and first card are both smaller than Party B’s (see point 3), then Party A is smaller.

C. If only one of Party A's last cards and first cards is greater than Party B's, and the other one is less than Party B's, then Party A and Party B are considered tied, and the term is called "passing over."

D. If Party A is a "water fish" and Party B is not, then Party A is bigger, and there is no need to check whether B's first and last cards are higher than Party A's. This is commonly known as "hard water fish". .

E. If both parties A and B are "water fishes", the outcome will still be determined according to the above rules A, B, and C.

F. If Party A is the "Supreme" and Party B is not, then Party A has the upper hand and is the "Supreme Hard Card".

G. If both parties are "supreme", without further ado, they are directly comparable to the cards.