Weihai's resident population is 1,413,200 males, accounting for 50.39% of the total population, and 1,391,600 females, accounting for

The sex ratio of the total population (male to female ratio with female as 100) has increased from 100.69 in the fifth national census to 101.55.

The national census is conducted by the state in accordance with a unified time schedule, methodology, items, and questionnaires, and the relevant departments of each region follow the instructions to conduct a full survey of the national population on a universal basis, household by household, and person by person, in accordance with the law. Person by person to carry out a full investigation and registration, the census focuses on mastering the analysis and prediction of the existing population development and change, mainly to understand the sex ratio, sex ratio at birth, singles, marriageable population, the elderly population, etc., the national census is also belong to the national conditions of the national strength of the survey. Nowadays, countries around the world widely used to collect demographic information, one of the most basic scientific methods, the national census around the results of the data, the relevant departments according to the depth of statistical analysis of big data and progress, around the world should be batch timely and accurate public.