3,000-6,000 Changchun Guo Jian Treatment: 3,000-6,000 dental nurses, Jilin Guo Jian Dental Clinic Co., Ltd., Changchun 1-3 years experience, junior college required. On the eve of Japan's defeat in 1944, Changchun had surpassed Tokyo, the capital of Japan, with a population of over1200,000 and an urban area of over 80 square kilometers, making it a veritable "largest city in Asia".