Interestingly I have now 2 Chinese fans of the same type:
They seem to come from the same makers. Apart from those I have never seen any such Chinese fans anywhere in collections, museums or books. I would date them rather early, around 1800. This is simply based on my "fan feeling" as I have nothing really to go upon. The The costumes of the fan with the ladies are, at least I think so, informal manchu court dress, the top gown a chenyi. Apparently this became fashionable in the latter half of the 18th century (Quianlong reign). The washers that are holding the pin that goes through the head of these fans are, I believe from the look and feel, jade. The sticks are apparently a type of spotted bamboo. The guard sticks are topped with ivory.
The clothes worn by the men and the woman in the other fan however resemble the Tang style of dress, which is not unusual if a motif of a Tang story or theatre play is featured on the fan leaf. This is as if a European fan would feature a medieval scene and everyone would be running round wearing tunics or surcoats.
Maybe somebody knows more about this type of fan?