For 10 points name this Chinese Buddhist dynasty, led by Wen-di and Yang-di, reigning from 581-618 CE, constructors of the Grand Canal.
Its founder Yang Jian implemented the Equal-field land system and the "rule of avoidance" preventing officials from serving in their hometown after conquering Nanjing with an eight-pronged assault, while this dynasty used Yuwen Kai to expand its capital at Daxing, built a second capital at Luoyang, and under Emperor Yang embarked on a trans-China project linking Yangzhou to Jiangsu province and Beijing. Defeats to the Champa in Vietnam and Eulji Mundeok of Goguryeo led to this group's fall only 37 years after its founding. For 10 points name this Chinese Buddhist dynasty, led by Wen-di and Yang-di, reigning from 581-618 CE, constructors of the Grand Canal.
Its founder Yang Jian implemented the Equal-field land system and the "rule of avoidance" preventing officials from serving in their hometown after conquering Nanjing with an eight-pronged assault, while this dynasty used Yuwen Kai to expand its capital at Daxing, built a second capital at Luoyang, and under Emperor Yang embarked on a trans-China project linking Yangzhou to Jiangsu province and Beijing.
{Sui} Dynasty