Tao Yuanming who is known as a pastoral poet by posterity seemed as a very quiet man. However, if you read his poems and essays carefully, you will find there are a great number of sad contents under the generous appearance, which shows an unique kind of sadness beauty. This essay expounds the beauty of sadness from five aspects--sad and mournful beauty of worrying life and death; wailful beauty of having no opportunities to be successful; moanful beauty of traveling, farewell and mournfulness; romantic sadness beauty of lovesickness and unrequited love; m...