Imports In 2020, Chinese Taipei imported $2.98k in Natural barium carbonate (witherite), becoming the 0th largest importer of Natural barium carbonate (witherite) in the world. At the same year, Natural barium carbonate (witherite) was the 0th most imported product in Chinese Taipei. Chinese Taipei imports Natural barium carbonate (witherite) primarily from: N/A.