Google and find thousands of articles stating Hong Kong's vital role. Do I have to post every single of them here.
Hong Kong could not have modernized China.
Hong Kong has no technology or patents.
Taiwan is the world #4 in cumulative USPTO patents. Taiwan is a world power in technology. Hong Kong is a nobody.
Technology does not drop out of thin air.
Where did China obtain its technology? It wasn't Hong Kong. It was Taiwan.
Where did China obtain the technology to produce digital cameras, personal computers, notebook computers, logic-chip semiconductor manufacturing, solar panel manufacture, 3G and 4G modem technology, smartphone manufacture, specialty chemicals, LCD displays, LED, CNC machine tools, etc.?
Taiwan made all of those products.
China simply learned Taiwan's technology and today, China manufactures the exact same products as Taiwan.
Hong Kong produces none of these advanced-technology products.
I ask again: Which country modernized China? It can't be Hong Kong, because Hong Kong doesn't have the faintest idea on how to manufacture advanced-technology products.
The answer is obvious. Taiwan has been manufacturing advanced value-added high-tech products for export. The technology was transferred to China and today, China is an exporter of the exact same high-tech products as Taiwan.
This process of technology transfer from Taiwan to China continues today. TSMC's transfer of 16nm logic-chip manufacturing to China in 2018 will represent the most advanced semiconductor manufacturing technology on mainland China.
Also, China has hired the former CEO of Taiwan's Inotera to spearhead China's development of memory chips. It is expected that the former CEO of Inotera will hire many of his colleagues from Taiwan. Taiwanese experts in manufacturing computer memory will be the foundation of mainland China's DRAM memory manufacturing.