Sai Wei's sister-in-law preferring to call herself by her maiden surname, after Hongsheng asked if she is Mrs. Sai Wu. That was before he was tasked to keep her company, which he did.
Mahjong is a game being played by four people, thus Uncle Qing's three wives were wondering where he has gone.
Mr. Liao's backstory is explained for the first time during the holiday in Cameron Highlands, when he told his story to Xiaodan.
Sai Qilin's house in Katong would also be where Renniang's mother Jin Meiji will be living in Singapore, after Qilin showed her the house upon her discharge from the hospital.
Sai Wei admitting for the first time to his mother that he has been gambling and borrowing money from loansharks, after Sai Wu's wife returned to the house to reprimand him of his gambling.