This VIP coupon is actually a replica of the zero-negative tour fee. By repeatedly forcing tourists to buy goods with high prices and high water content, they earn high commissions and pay tourists' travel expenses in Hong Kong. As far as we know, most travel agencies operating VIP tickets in the two places are unregistered/unlicensed travel agencies, commonly known as black cars, black tour guides and black travel agencies. Once they need to defend their rights, they will encounter many difficulties.
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