Complex sentence: In August 2008 Norman Cheng, father of HK singer Ronald Cheng, acquired the remaining portion of EMI Music Asia when EMI, which had entered China in the early 20th century, withdrew from the Chinese market.
Split into simpler sentences: In August 2008 Norman Cheng, father of HK singer Ronald Cheng, acquired the remaining portion of EMI Music Asia. This means the British EMI, which entered China in the early 20th century, officially withdrew from the Chinese market.