premise: A bird flu outbreak was reported in Wantang Village, Xiangtan County on October 18 and in Tianchang on October 20 respectively.
  All signs of the bird flu there have been eradicated and no new bird flu cases reported in the last 21 days in the two places after a three-week isolation, according to the MOA.
  At Wantang Village of Xiangtan county, veterinary staff and villagers celebrated the end of the quarantine by burning their protective suits and warning banners that had been used to cordoned off the area.
  The live poultry markets 10 kilometers in circumference from the affected region were also allowed to reopen.
  Despite the victory, the provinces of Anhui and Huhan have kept a close eye on the formerly affected areas to avoid reoccurrence of the disease.
   What event led to the live poultry markets to be allowed to reopen?
hypothesis: the end of the quarantine