According to our memory, Zhuhai & Zhongshan were nice places. Zhuhai has a land area of 1600 Sq Km (Approx.) and population less than 2 million, if there is no major mistake.
Like Shenzhen, it was also one of the Special Economic Zones in the Guangdong Province,PRC. It could be one of option to find a dream house for retirement.
Hope we can drive an electric vechicle there in the future.