What were China's two external exports in ancient times?

China exported silk and porcelain in ancient times.

China's ancient foreign trade has a long history and tradition. As early as the early dynasties of Xia, Shang and Wednesday, and even earlier in the late Neolithic period, it communicated with foreign civilizations through various indirect channels. After the establishment of the unified empire in Qin and Han Dynasties, especially after Emperor Wu of Han Dynasty made up his mind to open to the outside world and hollowed out the western regions, the direct trade route between East and West was opened, and the famous Silk Road began to take shape gradually. Businessmen from all over Central Asia, West Asia and South Asia crossed the snow-capped mountains and traded China specialties represented by silk with various overseas treasures. After the Tang and Song Dynasties, with the development of shipbuilding technology and the opening of sea routes, more and more overseas businessmen came to the major ports along the southeast coast by sea. The sea transportation volume is much larger than the land transportation volume mainly carried by camels. During this period, in addition to textiles such as silk, relatively heavy commodities such as porcelain and lacquerware also began to be exported in large quantities.