The trademark of Tiansudan is 880. Not sure if it is genuine. The identification method is:

1. Observe the bottle cap. The color of the protruding decoration on the top of the cap of the real Tiansudan paste bottle is a relatively bright deep red, while the fake one is a darker red. The genuine Tiansudan Essence bottle cap has a silver edge when opened, while the fake one has no silver edge.

2. Observe the threads on the mouth of the paste bottle. The thread on the mouth of the genuine paste bottle has only one circle, while the fake one has three circles.