Cheng's thumb disappeared.

Maybe there was too much rough work and it was worn out.

The phoenix eye pattern is a palm reading of China in Song Dynasty according to the god of linen. It appears on the thumb, which has a complete circle. This place is called the phoenix eye pattern. If this circle has an opening, it doesn't count. Palm fortune tellers believe that people with phoenix eye patterns are talented, intelligent and have strong management skills; Bold and adventurous. Ancient people thought that people with palm prints must be "satellites" and have the name of number one scholar. It would be more advantageous if both hands had such marks.