What does a bucket mean?

One barrel is poor and two barrels are rich: one barrel is poor, two barrels are rich, three barrels are four barrels of tofu, five barrels are six barrels of pawn shops, seven barrels are eight barrels of officials, and nine barrels are ten barrels of happiness.

As the saying goes, the bucket refers to the lines on each finger, and the shape of the bucket is a spiral. In the past, the bucket was a round instrument for holding things, so the thread on the finger was called "bucket".

Fingerprint use

Fingerprint has the characteristics of "life-long invariability and uniqueness". Long ago, people identified themselves with handprints on paper or boards. Fingerprint has been widely used in entry-exit inspection, searching criminals and other fields. Fingerprint is a kind of dermatoglyphics, which is formed by the linear arrangement of protrusions and depressions on the epidermis. The inner sides of human hands and feet are covered with dermatoglyphics. Fingerprints are widely used in searching criminals and other fields to identify people. The ancient Babylonians and China used fingerprints to identify people long ago.