In order to further open up the market, enhance the competitiveness of enterprises, and achieve a good start of high-quality and sustainable development。4月18日，Tongling unobstructed trading company chairman Tang Shicai, deputy general manager Yang Rong led the team，Successively went to Hubei Chibi City Jiayu County Yuanda Stone Co., LTD., Hunan Yueyang City Yunxi District road town Pai Lou mining company field visits，Learn more about the annual mining volume, mining years, varieties and prices of the two enterprises，Distance from mine to dock and freight information，And the site visited the scale of the enterprise mine，The raw materials of different specifications such as green stone, melon seed pieces and machine-made sand were sampled and brought back。