There are also calligraphy, ink painting, various Chinese dramas, and the thoughts of Confucius, Mencius, Lao and Zhuang
First of all, there must be a reference for the East. The currently popular meaning of the East is mainly Because Western civilization is now in a strong position, it uses Europe as a reference to follow the concept of East and West.
So the East definitely does not only refer to China. Japan, South Korea and even the entire Asia should be included in the category of the East.
However, because Chinese civilization is in a dominant position in the entire "East", and China is developing rapidly this year, there is a tendency to compete with the West, so the East will refer to China more often.
In addition, from a political perspective, during the Cold War, the East mainly referred to the Soviet-Russian communist camp. In this camp, China was not in a dominant position, and it was even hostile to the Soviet Union for a long time.
If you want to launch a movie based on Eastern culture, Chinese culture is inevitable. Because the entire East Asia region is basically under the influence of Chinese civilization.