YIFENG , Zheng. BREAKING THE VICIOUS CIRCLE: COUNTERMEASURES FOR HEILONGJIANG PROVINCE’S ECONOMIC DEVELOPMENT AND POPULATION EMIGRATION. American Journal of Business and Cooperative Research (AJBCR), [S. l.], v. 7, n. 1, p. 24–29, 2023. Disponível em: https://zapjournals.com/Journals/index.php/AJBCR/article/view/1257. Acesso em: 23 jun. 2025.