Answer:
They're less welcomed
Step-by-step explanation:
At that time, many traders from western nations (most notably Britain) came to China and sold various type of goods. Opium is one of the most popular product in Chinese market at that time.
This created massive addiction problems which destroy China's economic productivity. The western merchants on the other hand, accumulated large amount of wealth from this trades. As a result, a lot of hostilities toward foreigners started to build up during the Tang Dynasty.