First of all, the so-called clay pots and crocks here refer to pots and vessels made of clay at low temperature, excluding porcelain, which are made of kaolin at high temperature.

Secondly, the so-called ancient pottery pots and jars refer to those made before the Song Dynasty. By the Song Dynasty, because porcelain was very mature, ordinary pottery pots and crocks had basically lost their high value except those with special meanings.

Third, the value judgment of ancient pottery and crock is generally based on historical value, rare value, humanistic value and technical value.

Historical value: Generally speaking, the longer the history, the higher the value.

Rare value: Generally speaking, it is of great value to fill the gaps in archaeology or history.

Humanistic value: Generally speaking, words, paintings and special marks are of high value.

Process value: Generally speaking, the more exquisite the process, the higher the value.

Others: For example, generally speaking, the more complete the model, the more orderly it is circulated, the more famous people collect it, and so on, all of which increase its added value.

The value judgment of ancient pottery and crock has its correlation with the market value, but there are also differences. Sometimes the hot things in the market are not eye-catching in the eyes of cultural relics appraisers, but the treasures in the eyes of cultural relics appraisers are almost ignored in the market.