Funding of this research work is generously supported by the University Malaya Community Campus Grant-RUU2022-LL016;Private Grant PV086-2022(University Poly-Tech MARA-UPTM),Kuala Lumpur;Universitas Negeri Malang,Indonesia.
The implementation of China’s three-child fertility policy has led to a notable increase in multiple-child families.Notably,firstborn children experience a significant transition from being an only child to a non-only ...