Yabla video uses of

康熙 Kāngxī
雍正 Yōngzhēng
乾隆 QiánLóng
嘉庆 Jiāqìng
道光 Dàoguāng
de
They were written by Kang Xi, Yong Zheng, Qian Long, Jia Qing, and Daoguang.
zài
过去 guòqu
宫廷 gōngtíng
jiàng
yòng
一种 yīzhǒng
jiào
cuò
cǎo
de
植物 zhíwù
进行 jìnxíng
打磨 dǎmó
In the past, the royal palace used a type of plant called horsetail grass for sanding.