The Cut Sleeve: Romance in Ancient China

In ancient China, a young emperor became enamored with Dong Shan, a minor official. Their relationship was immortalized in the story 'The Passion of the Cut Sleeve,' where the emperor cut his robe to let Dong Shan sleep. The emperor intended to leave his kingdom to Dong Shan, but after his early death, Dong Shan was forced to commit suicide by the emperor's grandmother.

What is the name of the famous story associated with the emperor and Dong Shan?

What tragic event happened to Dong Shan after the emperor's death?