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[] B2 延期是否需先购回程机票?THANKS!yisengus 2003-11-27 10:31:00[] B2 延期是否需先购回程机票?THANKS!yisengus 2003-11-27 10:31:00[] Is the return ticket required?yisengus 2003-11-26 22:25:00[] Is the return ticket required?yisengus 2003-11-26 22:25:00