Can my sister handle immigration for my brother abroad?

My sister is abroad, so I can apply for immigration for my brother. However, the application time is very long, and the waiting time for relatives to immigrate varies from half a year to twelve years, depending on the category.

Population migration is an important demographic and social phenomenon, which greatly changes the social, economic, political, cultural, resource and environmental conditions related to the basic element of population in the emigration place and the emigration place, resulting in changes in the demand for production and life, public services, public facilities, resource utilization, ecology and environmental services. This is a systematic project, involving a wide range, complicated problems and far-reaching social and economic impact. However, improper migration will lead to conflicts between ethnic groups and social groups, which may lead to social exclusion and division, secondary poverty and social instability, increase the economic burden of the state and local governments and worsen the living environment.