Gallen Lo has to stay focus on acting his stern role; Fred Cheng says they seldom chat together

Singer, Fred Cheng (???) accepted an interview at radio station and when mentioned about acting as Gallen Lo's (???) son in new series lately, he replied he was excited to film with Gallen when knowing it initially. However, Gallen acted as a stern man and kept everything to himself and they seldom chatted together as a result. Gallen expressed he wanted to eat together with them after filming