Mr. Li bought 2.5 kilos of walnut from a street vendor in Zhengzhou city, Henan province on February 15. After he got home and cracked open some of them, he found that inside walnuts were broken concrete chunks. In order to reap more profit, vendors cracked open walnuts that have a thin husk, took out the nutmeat, put concrete nuggets inside and seal the husk with glue. To prevent the concrete nugget from knocking on the husk and making noises, the counterfeiters wrapped it with paper.