Huang, 39, shared the good news with a photo showing him doing a fist bump with his newborn son on his Weibo account, saying: "Little Sponge has arrived. Mother and child are well."
His company Huang Xiaoming Studio also posted on Weibo: "The 'AH' couple has a wonderful continuation of love. From now on, 1+1=3, this is probably what happiness looks like."
The 27-year-old actress, who remained slim throughout her pregnancy, had taken tonics to nourish her body for a month prior to the delivery, Apple Daily Hong Kong reported.
The A-list couple tied the knot in a lavish wedding ceremony in October 2015 after a six-year courtship.