Complex sentence: In 2003, author and TV producer Hai Yan selected her for the female lead in the TV drama version of "Goddess of Mercy", after which Sun became recognized as one of the most promising young actresses in China.
Split into simpler sentences: In 2003, author and TV producer Hai Yan selected her for the female lead in the TV series "Goddess of Mercy". She rose to fame after the series aired in China, and was recognized as one of he most promising young actresses in China.