Yin Yang Symbol is called Tai Chi Diagram in China. Tai Chi is the major religion topic of Taoism. Wu Dang temple is the place for Taoist monks. Wu Dang has its martial arts skill, just like Shaolin. The religion of Shaolin temple is Buddhism, which is from India. Taoism is China domestic religion. That's why Yin Yang philosophy impacts Chinese so long and deep.
Besides browsing variety of Yin Yang symbols, you should learn lots of Chinese Yin Yang culture from the following links.