Some time ago, I went to the Shanghai Museum to enjoy the "Baoli Fengwu - Blackstone Shipwreck Out of Water Treasures Exhibition" jointly organized by Shangbo and the Asian Civilization Museum of Singapore. Blackstone, a famous Arab merchant ship in the ninth century, was loaded with Chinese goods, sank in Indonesian waters on the way to the Middle East, and was salvaged in 1998. Its rich and varied water collections confirmed the economic and cultural exchanges between China and foreign countries in the first half of the ninth century. This time, the bronze mirror in the Blackstone Outlet Treasures, as well as the contemporaneous and the same bronze mirror in the Shanghai Museum and Yangzhou Museum collections. Usually, the pattern of the Blackstone Outlet Treasures is more blurred, and the collections of Shangbo and Yangzhou Museums are better.