They want to have jobs for their people. If everybody has a job, even the profit margin for that job is very thin, they are ok with that. Chinese government understands political instability, social instability... all come from unemployment. This employment-oriented economy policies started 30 years ago when China had 900 million farm population and it achieved huge success. No official stat, but it is widely believe the farm population has dropped to around 200 million.
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