永贞革新

yǒng zhēn gé xīn

Yongzhen Reform, Tang dynasty failed reform movement of 805 led by Wang Shuwen 王叔文[Wang2 Shu1 wen2]

永

yǒng

forever

贞

zhēn

chaste

革

gé

animal hide

新

xīn

abbr. for Xinjiang 新疆[Xin1 jiang1]