Yarlung Tsangpo Grand Canyon yields a special kind of stone called soapstone. The soapstone is very soft and local Moinba people use it to make the famous Medog stone wok. Making stone woks requires special skills, such as the ability to put the right amount of pressure when using carving tools. The wok's wall should be thin, even and smooth. Using Medog stone wok to cook can promote the hydrolysis of protein peptide chains into amino acids, so that the food tastes more delicious and nutritious.