Mainland firms are using the territory to test products and as a springboard for global expansion.
Beijing has been trying hard to encourage more young people to marry and have children.
Official figures suggest China's economy hit its target but analysts have cast doubt on the data.
Trump's import levies are still changing the patterns of international trade.
Economic uncertainty is encouraging some young people to cut back on their spending.
As the two nations vie for key materials, the US has regained the lead in foreign direct investments in African countries.
Beijing's leaders are deciding on a blueprint that sets China's economic goals for the next decade.
With Chinese youth unemployment high, individuals are paying to go into offices and pretend to work.
The world's second largest economy grew by 5.2% in the three months to the end of June, official figures show.
