Explainer: How important is Hong Kong to China as a free finance hub?

HONG KONG (Reuters) - Bankers and investors fear China's push to impose national security laws on Hong Kong threaten the city's future as an international financial centre. If it gets to that stage, Beijing's move will come at a cost for China's economy.WHY DOES CHINA NEED HONG KONG AS IT IS?China still has extensive capital controls and often intervenes in its financial markets and banking system. Hong Kong is one of the world's most open economies and one of the biggest channels for equity and..