Denying airspace transit is a new tactic – and its effectiveness may encourage China to use it again, says an academic. WASHINGTON: Last week, Beijing deployed a new tactic for diplomatically isolating Taiwan. On Apr 21, President Lai Ching-te postponed a trip to Eswatini , Taiwan’s last remaining diplomatic partner in Africa, after three countries abruptly revoked permission for his plane to transit their airspace. The three countries – Madagascar, Mauritius, and Seychelles – are believed to