Since be being produced more than 10 days by pilfer case by bronze mirror of all sides of museum of Dunhuang of picture of data of pilfer ancient lens, of police detect the job to still do not have revolutionary progress. To get clue of crack a criminal case, on September 8, dunhuang city public security bureau issues announcement of offer a reward of a huge sum, the person that provide important clue can win award 20 thousand yuan. On August 24, bronze mirror of all sides of Dunhuang museum exhibition hall by pilfer, among them at the same time " to 3 fair " home of bronze mirror dependency one class cultural relic, case since sending more than 10 days, dunhuang public security bureau establishs case group to spread out hammer and tongs detect the job, public security bureau of wine spring city expedites assistance of backbone of punishment detect technology to detect, but up to now the case makes progress without materiality. On September 3 afternoon, the superintend group that city public security bureau expedites wine spring to be guided by Xu Youyi of vice secretary of this bureau Party committee, standing deputy director general is driven go to Dunhuang, undertake supervising and direct to this case. On September 5, superintend group returns wine spring, backbone of punishment detect technology still stays in case group assistance to detect. Insider discloses, more than 10 days since, police is in Dunhuang city each antique markets undertook with a few places carpet type platoon is checked, but did not obtain valuable clew, detect the job to do not have revolutionary progress, main reason is museum respect cannot decide bronze mirror by the specific time of pilfer, did not protect the first spot good, fail to be in call the police for a short while, make the investigation of police obtains evidence working difficulty is heavy. But under, offer a reward of Dunhuang public security bureau collects clue of crack a criminal case 20 thousand yuan.