@article{Cheng2021,
author = {Cheng, M. and Duan, C.},
title= {The changing trends of internal migration and urbanization in China: New evidence from the seventh National Population Census},
year = {2021},
doi = {10.1007/s42379-021-00093-7},
volume = {5},
number = {3},
pages = {275--295},
}