The Yuan Dynasty
Certain Chinese innovations and products, such as purified saltpetre , printing techniques, porcelain , playing cards , and medical literature, were exported to Europe and Western Asia, while the production of thin glass and cloisonné became popular in China. Yet, Toqto'a resigned his office with the approval of Toghon Temür, marking the end of his first administration, and he was not called back until His son Zang Yan fled to exile among the Xiongnu.