CHANGES FOR S/H CLASS FARES BEFORE JOURNEY BEFORE FLIGHT NO CHARGE BEFORE JOURNEY AFTER FLIGHT - ORIGIN CAN MUST BE CHARGED CNY 525 - ORIGIN BJS/SHA MUST BE CHARGED CNY 850 AFTER JOURNEY BEFORE FLIGHT NO CHARGE AFTER JOURNEY AFTER FLIGHT - ORIGIN CAN MUST BE CHARGED CNY 525 - ORIGIN BJS/SHA MUST BE CHARGED CNY 850 REFUND REFUND NOT PERMITTED