The flight path from Taipei, Taiwan, to Tianjin, China, does not go directly to Tianjin in a straight line.
Instead, it heads directly north, then banks left (west) before heading north again.
(FlightActual flight CCA188, source: FlightAware)
RoutePossible route: PIANO L3 VIOLA R596 OKATO W13 PINOT B221 OKTUG W506 HGH W554 DOGVI A470 PIX A593 VYK VYK9A/16R (sourceused by virtual crews on simulation networks, source: VatAwareVATAware.)
Does anyone know why this is?