How to draw the weapons of Song Wu?

Song Wu's weapon is a snowflake wrought iron Buddhist monk's knife. Snowflake iron Buddhist monk's knife is the weapon of Song Wu in Water Margin. Song Wu's weapons are painted as follows:

1, draw double knives as shown below.

2, color, divided into three parts, the knife is two parts, the color is from light to dark, the handle is yellow, so Song Wu's knife is painted ~

In addition, it is described in chapters 27, 28, 3 1 of Water Margin, and the original text is as follows:

"Nothing else matters. There are two things that are the most difficult: one is 100 beads made of a single bone, and the other is a Buddhist monk's knife made of two pieces of snowflake wrought iron. " "Zhang Qing took out two Buddhist monk's knife to Song Wu. It is made of wrought iron, not built in a day. ""Song Wu pulled out two Buddhist monk's knives like rotten silver at his waist and looked at them in the moonlight. They are good knives.