Via PVG.
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Source:
My Asia Travel Blog
Information from matrix:
Travel restrictions
VALID FOR TRAVEL COMMENCING DEPARTURE OF FIRST INTERNATIONAL SECTOR ON/AFTER 01JAN 20 AND ON/BEFORE 30JUN 20.
Stopover restrictions
IF THE FARE COMPONENT INCLUDES TRAVEL WITHIN CHINA ON ONE OR MORE OF THE FOLLOWING MU FLIGHTS 6001 THROUGH 6199 MU FLIGHTS 6500 THROUGH 6599 MU FLIGHTS 6700 THROUGH 6799 6 FREE STOPOVERS PERMITTED ON THE PRICING UNIT - 3 IN EACH DIRECTION. A STOPOVER MAY NOT EXCEED 7 DAYS.
Maximum stay requirements
TRAVEL FROM LAST INTERNATIONAL STOPOVER MUST COMMENCE NO LATER THAN 3 MONTHS AFTER DEPARTURE OF THE FIRST INTERNATIONAL SECTOR.