AidData, a research lab at William & Mary, published on 25 July 2023 a study titled "Harboring Global Ambitions: China's Ports Footprint and Implications for Future Overseas Naval Bases" by Alexander Wooley, Sheng Zhang, Rory Fedorochko, and Sarina Patterson.
The authors suggest a list of port locations--where China has invested significant resources and maintains relationships with local elites--that may be favorable locations for future Chinese naval bases.