Summer last name of the highest population density per unit area in anhui province can jiang, northeast China, per square kilometer of summer surname population reached 1.2 or more persons, central region in 3.6 above.Summer surname distribution density diagram shows that the highest density of (more than 1.2 people per square km) in only 9.7% of the total land area, the summer surname population about 1.713 million;0.6 1.2 people per square km area 19.7% of the total land area, the summer surname population about 1.572 million;Less than 0.6 people per square km area 70.6% of the total land area, the summer is a population of about 1.395 million.

Summer surname distribution is very wide, but not balanced.In the south of zhejiang, Su Wan eastern, eastern hubei and hunan, jiangxi, northern, eastern, southern jilin, qian xia family name of the local population, generally over 0.51%, central region above 1%, covering area accounts for 7.7% of the total land area;Ningxia, east sichuan, nanling elsewhere in the north, east, summer surname accounted for the proportion of the population in 0.17% - 0.51%, covering area accounts for 43.2% of the total land area;In most of guangdong, hainan and Taiwan in other parts of the west of northeast, Inner Mongolia, gansu, the proportion of the 0.17%, covering area accounts for 49.1% of the total land area, with less than 0.1% of the area covered by 37%.