Akiko bracelets are of average value, but their playability is still relatively high, because they are oily and easy to make beautiful appearances. Pine will age and corrode after death, and the unique oil of pine will penetrate into the wood. After a long period of geological changes and water erosion, the polymerized part of oil will be combined with wood strips into a whole. This substance is pine nuts. When Qiu Zi reaches a certain age, she will develop from wood to stone, also known as amber. Amber has a natural fragrance and is a rare string player.