Meaning:

1. If the product of two numbers is 1, one of them is called the reciprocal of the other. If the reciprocal of 2 is 0, the reciprocal of 5 is 0.

2. Reverse serial number (Shanghai); Counting from the back to the front (sh avatar)

Example: countdown before bomb launch.

Extended data antonym: money cat

Pinyin: Qin máo

Meaning: vanguard troops.

Interpretation by reference:

1, ancient March outpost scouts. In case of enemy situation, raise warning signs to the rear troops.

2, extended to pioneer and pioneer.

Chen Yi's Preface to Hu Hai Poetry Society: "Struggle at the forefront, bend and stretch into righteousness."

3. Think that the test scores or other aspects are in the forefront compared with others.

Reason "Ode to Middle Age": "Her production quality remains first-class, ranking among the best."

In the last exam, his grades were among the best in the class.