Ndiani akatanga kunyora mamiriro okunze?
Kunofungidzirwa kuti vanhu muChina vakanyora mashoko pamusoro pemhepo, mvura uye sinou pazvidimbu zveganda reshumba. Humwe uchapupu hunodzokera shure kumakore 3000, kuchiita kuti vaChina vave vokutanga kunyora mamiriro okunze.