I'd have to look to be sure but my bet's on Luke doing the picture of his doing the canoe with the girl (Bo Ling, who was also # 1 daughter in Black Camel) in Shanghai.
She's also in another sequel/remake: Calling Philo Vance, an entry that was The Kennel Club set against WWII with airplane plans instead of Chinese art at its core. SHe was the housekeeper replacing James Lee, the original's houseboy.