Judging from the autograph, the picture taken with Boyaxuan () is by an author, (/26/arts_1.asp? id=12& amp; Typename=#byx) This dragon character, a four-foot banner, sells for 5 yuan. More than 1 yuan a foot, not cheap.
I don't know much about valuation. Yours is a sector, which is close to a square foot. I'll estimate 8 yuan.