Tree-changing started before the pandemic
Migration outflow from, and inflow to, capital cities
Tree-
changers leaving cities
Regional
residents moving to cities
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
0
20
40
60
80
100
120
140
160