Explainer: How important is Hong Kong to the rest of China?

Concerns over Hong Kong's political and economic future are growing as pro-democracy protests drag on and turn increasingly violent, and China makes clear that forceful intervention is possible.

source https://www.reuters.com/article/us-hongkong-protests-markets-explainer/explainer-how-important-is-hong-kong-to-the-rest-of-china-idUSKCN1VP35H?feedType=RSS&feedName=worldNews