Xinhua News Agency, Fuzhou, August 22nd (reported by Jianqiang Lai) -- Recently, the Zhejiang provincial administration for industry and commerce randomly checked over 30,000 problematic blood-red swiftlet nests and released relevant information. It is reported that some of the blood-red swiftlet nest products from Fujian were found to contain 11,000 mg per kilogram of strongly carcinogenic substance sodium nitrite, which exceeds the relevant standard by more than 300 times.