The film star said in his first comments in person after the arrest: "I am always a father. I used to be an unqualified father. Now, after this event, I want to be a qualified father."
Jaycee Chan was detained in August and was formally arrested the following month on suspicion of allowing other people to consume drugs, a charge that carries a maximum sentence of three years' imprisonment.
Chan apologised in a statement soon after his son's arrest and pledged to work with him on his recovery.