BJ Air 188.8.131.52
Reduce data consumption (about 70% reduction) by server access optimization and not update all 4 cities at start.
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SORRY TO FIX THE BACKUP SERVER SINCE DATA WAS BROKEN MORE THAN ONE MONTH AGO. Still trying to fix the primary server to improve the data fetch speed.
This new version support WP8 wide tile, showing history on the wide tile.
PM2.5 of Beijing Shanghai...