A beautiful (and unopened!) art-deco design tea tin of "Selected Tea" by the Sincere Co. Shanghai. Sincere was the first Chinese-owned department store in Shanghai, opened in 1917. It was also the first of the "4 Big Department Stores" of Old Shanghai, followed by the Wing-On, the Sun Sun and the Sun. The relentless competition between them spurred modern retail innovations throughout the 1920s, 30s and 40s, such as in this case consumer packaged goods under "Sincere's" own private label brand and registered trademark (环球货品).