Keep in mind China has a much tighter family structure where children look after their elderly parents (and often live under the same roof), and in return grandparents provide free childcare so both parents are able to work full time. Nursing homes are not incredibly common but it might become a bigger problem as more and more young people move away from their family in the countryside to work in the bigger cities.

Pretty good. My mum’s living in Shanghai (most populous city in China) and has been a pensioner for 20 years. It’s enough money to get by and now that she’s 70 she also receives monthly coupons for her neighbourhood canteen (although food is already very cheap)

Women in China retire at age 50, men at 60