the sui began to experience problems on account of unsuccessful actvities of... what

Question

fill in blank

Answer 1

"There was a lot of discontent about the loss of life, the forced labor, and the heavy taxes. Heavy taxation and compulsory labor duties caused widespread revolts and a brief civil war. Emperor Yang was assassinated in 618 by his adviser, Yuwen Huaji."

 

https://www.chinahighlights.com/travelguide/china-history/the-sui-dynasty.htm