The British Proclamation of 1763, the war of 1812, geological barriers and the lack of modern-day transportation all provided resistance against westward migration.
英国1763年公告、1812年战争、地理阻隔和现代交通的缺少都对向西迁移产生了阻碍。
2
The geological condition is complicated and varies often. Using the method of pre-support through hammering wedge, the cave mouth digging work of No. 640 main transportation channel was successful.
The port construction, shipping transportation and reclaim land from costal zone are sometimes endangered, which is the characterized geological disaster in Jiangsu Province.