In front of an agate stone booth, Liu stopped. On the showcase, there are exquisite stones, one by one, standing on the brocade and under the glass cover. Exhibitors come from Xunke County, agate producing area in Heilongjiang Province. The price of the stones on the display case is four or five figures, and Liu is not tempted. At a glance, he saw several silk bags filled with stones in the aisle of the showcase, and there were several dusty agate rough stones on the bags. He picked up a few pieces and looked at them. There was nothing satisfactory. Then he picked up a long one: at first glance, it looked like a spot, but it couldn't be wiped off. All the colors were exposed, green, like mold. When he looked at Liu's side upside down, his heart thumped-the stone skin on this side was bright and fleshy, just like bacon skin. This agate stone from Xunke, under the bright skin, is layered with crimson, light red and light yellow stones, with distinct layers, such as pork with five flowers and three layers, and the green spots that Liu saw at first sight are precisely the molds that are easy to grow when bacon is long. This long stone is an almost genuine bacon stone.

From Nenjiang County to Molidawa Banner, it is the middle reaches. The agate stones here are mostly mountain materials and earth materials, between water materials and Gobi materials, and there are more stones than pictographs. The Tailai boundary from Mozambique to Qiqihar is the downstream. Most of the agate stones here are hidden in the river sand on both sides of the river, which are small and pictographic washed stones.