Original: When Sun Ce was assassinated by the retainers of Xu Gong , whom Sun Ce had killed in battle several years prior , in 200 , the eighteen-year-old Sun Quan inherited the lands southeast of the Yangtze River from his brother .
Simplified: After Cao Caos son Cao Pi started the Wei Dynasty in 220 , Liu Bei also wanted to be an emperor and declared himself Emperor of Shu Han in 221 .