A strong earthquake measuring 7.6 Richter scale hit Changma fort (39.7°N, 97.0°E) in Gansu Province at 10:04:27 am on December 25, 1932. The epicenter intensity was X and 70 thousand people lost their lives in the quake. When the earthquake jolted, wind blowing the dust connected with white light flying across the yellow soil wall; rocks shook down from the mountain. Jiayuguan Pass, the famous historic site of China, a corner of which was collapsed; snow peaks fell down in southern bank of Shulehe River; rocks and stones dropped in Thousand Buddha Caves...Aftershock lasted as long as a half year. This unusual strong earthquake brought various opinions among scientists all over the world. Changma, a place that cannot be found its trail in the map, has becoming the concern center of seismologist.