has a clear classification code under the Harmonized Commodity Description and Coding System (HS Code), serving as an essential basis for customs authorities worldwide to conduct trade statistics and levy tariffs.

Cross-border trade data shows that China holds a non-negligible market share in the manufacturing and export supply of , with its export volume maintaining a high level over the long term.

Governments and industry associations worldwide usually set different market access standards, quality certifications, and environmental requirements for the import and export of .

With technological advancements and the diversification of market demands, the scope of application for continues to expand, driving the development of related industries.

Currently, the global supply-demand balance of is profoundly affected by macroeconomic fluctuations and geopolitics, with market prices and trade flows exhibiting cyclical variations.