Prepare a pencil, a punch, two pieces of Hetian jade seed stone, fine iron wire and fine water pipe.
Straight hole play, take out a piece of original stone, draw a crosshair on one end of the original stone with a pencil, draw one on the front and one on the back, and be sure to be symmetrical, otherwise the hole will be crooked.
Open the water pipe, aim at the position to be drilled, start the puncher, and drill from one side with a drill. Note that the water source faces the punching position. When the hole is about to be drilled through, start drilling from the crosshair on the other side until the hole is opened. The straight hole has been drilled.
Pass a thin wire through it to see if it is open.
2, cattle nostril play:
Draw a center line and two symmetrical points on the vertical lead of Hetian jade original stone, and don't get too close, otherwise it will break easily.
According to the position of the line drawing, use the drill bit of the punching machine to gently lay a little bit from one point, shake it gently when hitting, and hit it from shallow to deep.
After hitting a symmetry point, hit another symmetry point until the two symmetry points intersect.
Check whether there is an open circuit with a thin wire. If the wire can easily pass through, it means that it has been opened, but it is impassable. Continue to hit two symmetrical points until they intersect.