Zheng , Di, and Yihan Ke. “Qingyang Sachet in Gansu Province: A Preliminary Investigation on Sustainable Development of Local Traditional Handicraft”. Journal of Ecohumanism 3, no. 8 (January 2, 2025): 10635 –. Accessed April 28, 2025. https://ecohumanism.co.uk/joe/ecohumanism/article/view/5675.