I think the modern Asian work culture is also non-conductive to having a good family life, somehow China is probably the least extreme of the bunch when compared to SK/Japan, no amount of pro-natal policies are going to incentivise people to have kids if the father is at work 6/7 days 10 hours a day. The mother would have to be a housewife and basically stuck at home babysitting, which severely limits household income with skyrocketing cost of living.You are far off with your dates but, ultimately yes. Without intervention China's demographics will mirror Japan's just like South Korea's is.
Since the 80s Japan has tried all sorts of incentives to try and convince people to have babies, all have failed. Back in the 80s they also fantasied about how robots would replace people. It looks like now they've given up and finally decided to copy the western model which is to import people.
Granted even western European countries are facing the same crisis, so the above would just be one of the factors, not necessarily the only one.