Jaycee Chan and Kai Ko were arrested in Beijing for the use of drugs on Aug 14.
Both are still held in detention centres and have not seen their family members since. Even Jackie Chan was denied access to visit his son.
According to Finger Daily, when police seized more than 100 grams of marijuana from Jaycee Chan's house before news of the scandal broke, his mother Lin Feng-jiao had been present at the scene.
She witnessed him being taken away in hundcuffs and nearly collapsed.
It was also reported that Jaycee Chan's stint in the detention center has resulted in him looking worn out and helpess, with him losing 3kg.