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Marine Economic Development Demonstration Zone, Wenzhou City, Zhejiang Province, China
To address any concerns regarding our logo update, please note that the EU trademarks “tongou” (Registration No. 018630309) and “Chayo” (Registration No. 019312969) are both owned by Changyou Technology (Zhejiang) Co., Ltd.
This logo update is only a visual upgrade and does not affect the ownership, validity, or exclusive use of the above trademarks. It also has no impact on product quality, performance, specifications, after-sales service, or business cooperation.
All products and services remain consistent and reliable as always.
Marine Economic Development Demonstration Zone, Wenzhou City, Zhejiang Province, China
Sales: [email protected]
After-sales: [email protected]
© 2026 Changyou Technology. All Rights Reserved.