ZSWH RUNWAY DIRECTION
Runway direction of ZSWH airport are 03/21 but Windy said 02/20. It should be changed.
You are right. Airport runway designations are based on their magnetic headings—and the planet's magnetic poles can move!
ZSWH changed runway naming someday between 2014-2016.
Windy uses ourairports.com as airport database.
This database is very outdated
I think Windy must use another database for airport's data.