1990, why is the mainland less developed than Hong Kong?

1990, China was only 10 years after the reform and opening up, and it was still in the primary stage of development. Hong Kong was once a British colony. At that time, there was a lot of economic and political injection, including technology, so it was normal to say that it was more developed than Hong Kong. Now China is developing in an all-round way. So it's only a matter of time before we surpass Hong Kong.