在黑龙江省北部的五大连池市双泉乡，笔者发现农户家的院墙，不是常规的用土坯垒起来的或是用庄稼杆、木板条夹起来的，而是用黑棕色的火山熔岩块石垒起来的。一位村妇说，永远能用。司机说省事，不用夹板障子。王明山工程师说，墙倒石头在。　　这三种回答，向人们传递了一个 In Shuangquan Township, Wudalianchi City, northern Heilongjiang Province, the author found that the courtyard walls of peasant households were not conventionally encased in adobe or clamped together with crop rods and wooden planks, but rather they were covered with dark brown volcanic lava blocks Up One villager said that it can be used forever. Said the driver save trouble, do not splint barrier. Wang Ming-shan engineer said the wall down the stone. These three answers delivered one to the people