The correct answer to this open question is the following.
A valuable cloth made only in China, called silk, was highly prized in Europe.
European people always have had fine taste. They like quality and luxurious products. That is why they wanted silk so much. Silkworms are animals that produce silk when they work in their cocoons. This fine piece of cloth was one of the most precious products in ancient Chine as well as porcelain. For Chinese people, wearing silñk clothes represented a symbol of status and respect. When European people first saw Chinese silk, they felt in love with this product.