Recently, CAAC announced circuit breaker measures for a number of flights, which were China Eastern Airlines’ Flight MU712 (Sydney - Hangzhou), Air China’s Flight CA722 (Minsk - Hohhot), Air China’s Flight CA912 (Stockholm - Beijing), China Southern Airlines’ Flight CZ308 (Amsterdam - Guangzhou), Flight CZ312 (Toronto - Guangzhou) and Flight CZ328 (Los Angeles - Guangzhou), Egypt Air’s Flight MS953 (Cairo - Hangzhou), Lufthansa’s Flight LH720 (Frankfurt - Shenyang), Scandinavian Airlines’ Flight SK997 (Copenhagen - Shanghai), KLM Royal Dutch Airlines’ Flight KL831 (Amsterdam - Hangzhou), Delta Airlines’ Flight DL287 (Seattle - Shanghai), Kenya Airways’ Flight KQ882 (Nairobi - Guangzhou), United Airlines’ Flight UA857 (San Francisco - Shanghai), Delta Airlines’ Flight DL283 (Detroit - Shanghai), American Airlines’ Flight AA127 (Dallas - Shanghai), Neos Air’s Flight NO946 (Milan - Tianjin), Lufthansa’s Flight LH720 (Frankfurt - Shenyang) and Delta Airlines’ Flight DL287 (Seattle - Shanghai).