正当业务 meaning in English

legitimate business
legitimate busuness

A lawyer should avoid even the appearance of professional impropriety
律师甚至应避免出现不正当业务现象。
The permanent offices and their staff must abide by chinese laws and decrees and the rules hereof and carry out proper business activities within their business scope
常驻代表机构及其人员，必须遵守我国的法律、法规和本办法，在批准的业务范围内开展正当业务活动。