Yes, they are truly Chinese. From top to bottom：
鹏雅精瓷： “精瓷” is a kind of chinaware, and “鹏雅” is the brand name, I think.
鹏祥：(the words from left to right) I think it is also the brand name of the plate/tea set.
吉：which means “lucky”. I think it is the Chinese character “吉” with a circle around it in the picture.
金顺：in the picture, the words are upside down with the logo(or some image) in the middle. I think it is also the brand name. “金” means “gold”, while “顺” means (everything goes)smoothly; without a hitch.
As far as I know, in the old times, in the bottom of chinaware, people will write the name of the year of that dynasty, like "大清雍正年制(Made during Yongzheng's ruling years of Great Qing Dynasty)". In the modern time, the chinaware tea set or wine set are tend to be written on the brand name or factory name on the bottom.
Correct me if I am wrong :)
Meanings are searched based on http://www.xiaoma.info/