31年前的9月23日,我国成功地进行了第一次地下核试验。这是一次平洞方式的地下核试验。我参与了这次试验的部分准备工作,现作如下回忆。我国提出地下核试验的问题是在1963年。这年7月25日,美国、英国、苏联三国的代表,在莫斯科草签了《关于 31 years ago, on September 23, my country successfully conducted its first underground nuclear test. This is a flat-core underground nuclear test. I participated in part of the preparatory work for this test, now make the following memories. The issue of underground nuclear tests put forward by our country was in 1963. On July 25 this year, the representatives of the United States, Britain and the Soviet Union signed the "