These beautifully handpainted tea cups are of the Canton-style but most likely made in Macau. Geographically it is actually not far between Canton, Macau or Hong Kong since they are all located in the Pearl River delta in the Guangdong province of China. John Webber accompanied Captain Cook on his third voyage to the South Seas and visited Macau in 1779, publishing his book "Views in the South Seas" in 1780. The cups have a mark: Qianlong Nian Zhi (Qianlong Period,  1736-1795) but are guessed to have been made around 1965.

From Becky Dietrich (Houzz Design Contributor) about using mixed-china to make unforgettable table settings (see photo from elegantwedding.com):
Dishes — formal or casual — come in sets of four, eight, 12 and even 24 in stores. That’s the way it’s always been, and that’s the way it ought to be.
Says who? After all, where’s the fun in that? Have you ever been to a flea market or garage sale and seen some dishes you just loved, but there were only three, so you passed them up? Truth is, the most memorable table settings I have ever seen were a lovely hodgepodge of patterns and designs — not only the plates, but the flatware and glassware as well.
Ignore the small voice that whines, “You can’t do that!” The reality is, dishes and glassware break, and flatware disappears into a parallel universe. Does that mean we have to go buy new matching sets? Absolutely not. We just need to adjust our thinking away from sets and into mixing. A collection of plates will create table settings your family and friends will marvel over.