As was already mentioned, karate originated in the native fighting arts of Okinawa, and was influenced by Chinese arts before being imported to mainland Japan. One thing to note is that it was also strongly influenced by the martial arts of the Kingdom of Siam (modern-day Thailand), which isn't surprising given Okinawa's seafaring nature and trade-based economy. The Okinawans very much mixed-and-matched martial methods, which is why you have people who say things like "karate is the original MMA," although that is rather disingenuous, since plenty of martial arts have done the same type of assimilation over time.
With regard to the OP's question, itself, karate does bear some obvious resemblance to Chinese arts, to varying degrees in different styles. Sanchin is the easiest, clearest example, because it is one of the few forms that you can still find extant examples of in China that have analogs being practiced in karate. This video is old, but does show Sanchin from a couple different karate styles, as well as a Chinese version:
The biggest carry over from Chinese arts to Okinawa is probably the use of forms/kata, in general, even if a style doesn't have kata that came directly from China. As such, even if you don't see sister forms between karate and Chinese arts, you see a lot of the same movements and postures. A lot of the joint locks and chokes are similar, if you compare Okinawan tuidi to Chinese chin-na, although not always identical. Karate has a number of throws that you see in Chinese arts, as well, although they had their own folkstyle submission wrestling methods, too. I think Okinawan striking tended to be more influenced by ancestral Siamese/Thai arts than Chinese arts, personally.
All that being said, there is NO SUCH THING as a "single origin" of martial arts, and similar or even identical methods can be developed by different people, worlds apart, with no contact with each other, whatsoever. I feel that is an important caveat.
