The landlord can check the detailed address and telephone number of Baidu: Guangzhou Jewelry and Jade Appraisal Center is based on his province, such as Guangdong.
If you want to identify jewelry and jade in Guangzhou, you can go to Liwan Square in Liwan District. There are several streets with jewelry and jade shops and several authoritative appraisal agencies.
There are three authoritative appraisal institutions with national qualification certification in Guangzhou, which can appraise jade articles. The specific address and telephone number can be found in Baidu-Guangzhou Jewelry and Jade Appraisal Center.
Guangzhou's largest jade wholesale market is in Hualin Temple, Sihui, Jieyang and Pingzhou. As for jade identification, there are wholesale places in Guangzhou. If you want to hang an appraisal certificate on every piece of jade, then take every piece of jade for appraisal. A certificate is about 10 yuan. If in doubt, please remember to adopt it.