I have not seen anything yet that would cause me to want to go above the base rate. Djibouti was an easy win for China, and I'm just not sure another one is doable for them quite yet. The US recently used its softpower to deny China a base in Gabon:

The US move comes after what American officials say were Chinese attempts to establish a military training facility in the Atlantic coast nation, which US officials believe could serve as a precursor to a permanent base. The US maintains a sprawling network of military installations around the world — including in China’s backyard — but views any Chinese base on the Atlantic as a red line.
The package, which isn’t finalized, will be unveiled during a visit to the US by Gabonese interim President Brice Clotaire Oligui Nguema in late September or early October, the people said. It will also include radar to help the country monitor illegal fishing, an expansion of its partnership with the West Virginia National Guard, and assistance with conservation in its national parks.