It is true that Sister Lan sells corn poppy. Sister Lan sells real goods. Because for Lanjie jewelry, because jewelry is made of precious metals, all jewelry sold in Lan Jie has an appraisal certificate issued by an appraisal institution, and jewelry with an appraisal certificate is genuine. Because the appraisal agency is a third party, Lan Jie can't influence the appraisal agency, so the jewelry sold by Lan Jie is genuine.