Military exercises thought to be behind the flight cancellations and delays for next few weeks . Domestic travelers switching to international travel , leading to overcrowded trains . Another 120 flights were delayed for more than two hours . Several airports in China to be affected , including both Shanghai airports .
Military exercises thought to be behind the flight cancellations and delays for next few weeks . Domestic travelers switching to international travel , leading to overcrowded trains . Several airports in China to be affected , including both Shanghai airports .