What is the specific content of economic and cultural exchanges between the Han Dynasty and the Western Regions?

The Silk Road strengthened the economic and cultural exchanges between the Western Han Dynasty and western countries. China's handicraft technologies, such as metallurgy and sinking, spread to the west one after another, and cash crops such as grapes and alfalfa in the western regions settled in the Central Plains. The influence of the Western Han Dynasty directly affected Central Asia, West Asia, South Asia and Europe. Connecting China's ancient culture, Indian culture, Arabic culture with ancient Greek and Roman culture has promoted the economic and cultural exchanges between China and the West, and is also the channel for Buddhism and Buddhist art to be introduced into China ~