Distinguish the authenticity of jade
Ultrasonic carving, it should be mountain material. Baidu library has an introduction, you can have a look for yourself. "/link? URL = 3 fxohybi _ v5khb 1 OSL _ fp3r 29 tddpdox 7 gzae 5 ulty _ o 3 uwo 2 f 33 XB 00 tclbygchjlt 2 a5p X5 daiek-pat 4 rn _ dfzgucdmv 1 mxzikw "