But luckily the tickets for the new lotto games are printed on heat-sensitive paper, which fades after three months. The tickets are worthless as collector's items, so Chang is spared the expense of collecting them.
幸好接著發行的「大樂透」首次採用感熱紙列印，3 個月後就字跡全無，不具收藏價值，否則張維信恐怕又要荷包大失血了。