How did the attitude towards foreigners and trade routes change during the Tang Dynasty
?

They're less welcomed

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.

i want to say death; parole, probation, and fines are still being used all the time.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.