Who is Wendi and what did he do?

Wendi is an emporer known from 581-589 whom was originally known as Yang Jian. He massacred 59 royal princes. Afterward he declared himself emporer of the Sui Dynasty. Wendi was born in 541 to two high officals in the Chinese government. Wendi was also originally a general in the army of Zhou. After he resigned from being a general for the army, he began to rule over a Dynasty which was known as, The Sui Dynasty. He was the first Chinese emporer for 369 years. That's a long time! Wendi also had a son named Yang Di who took over the Sui Dyanasty after Wendi passed away.