Complex sentence: The script was not written by Ricky Lau alone it was written by many script writers, who included Roy Szeto (Chak Han), Wong Ying and Barry Wong (Ping-Yiu).
Split into simpler sentences: The script was not written by Ricky Lau alone. It was written by many script writers, including Roy Szeto (Chak Han), Wong Ying and Barry Wong (Ping-Yiu).