Realistically, the question is how much of impact can government enforcement and policy have in reversing this birth rate decline.
I wonder if they will enforce family development through legal means the same way they did with population control prior to 2015.
Birth rate decline is almost entirely due to time cost of expected quality of life, its how much time you need to work to obtain the lifestyle you desire.
Thats to say simply making more money isnt enough, and having more free time doesnt either. Birth rate used to be high because people had lower expectations and didnt need to work as much to achieve that lower expectation, now people either need to work long hours, or doesnt make enough with hours worked.
All of which are the core problem China's "overcapacity" and massive robot deploymemt is intended to address. People always ask what do you do if robots took all the jobs, but thats implictly assuming a corporate run society, the real answer to that question is robots provide the abundance needed for people to work less while still making enough to meet their expectations, robots decrease the time cost of expectations and this is what will solve demographic problems