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on september 1, cctv finance exposed the dark side of wolfberry processing in qinghai and gansu with "excessive sulfur". mr. zhang from gansu has been growing wolfberries for 20 years and currently operates a brand of sulfur-free smoked wolfberries. on september 2, he said that the rain this year affected the appearance of wolfberries, and the cost of building a drying room was too high, so some farmers would choose to smoke wolfberries with sulfur. mr. zhang said that in general, if farmers want to sell them at a good price, they must meet the purchase requirements of vendors: good color and appearance. he said that the lowest price of wolfberries he sells is 55.8 yuan/jin, "but the profit may not be as good as the 20 to 40 yuan/jin of wolfberries. there are very few sulfur-free smoked and non-additive wolfberries. to buy good wolfberries, the price is at least 60 to 70 yuan/jin."

he also said that sulfur fumigation and the addition of sodium nitrate are common phenomena in all wolfberry producing areas across the country. "consumers want to buy wolfberries with good appearance. merchants cater to their needs and charge farmers for wolfberries with good appearance. this will force farmers to add sulfur fumigation." he said that if vendors can get wolfberries with average appearance and reasonable prices, farmers will naturally not add it. the main problem is not the farmers, but the wolfberry vendors in the middle. "the most important thing is that policy supervision should be stricter, the investigation and punishment should be more severe, and the punishment should be heavier. in addition, policy subsidies should be increased to support wolfberry growers to build drying rooms." he said that in rainy weather and when wolfberries cannot be dried by the sun, if farmers have drying rooms, they do not need sulfur fumigation. but building a drying room may cost tens of thousands of yuan, and farmers only earn a few thousand yuan for planting one acre of wolfberries.