"干" in "干个体" means "do". For example,“你是干什么的？”means "what do you do?". "个体" is privately or individually owned business. So "干个体" means do some privately or individually owned business.

Operate business by oneself, usually, not corporate."干个体" is an old word, you know, it was planned economy in mainland of China, "干个体" is opposed to "State Owned".

"干个体"means small private business ,such as open a little shop or something.

thank you very much everyone!!

Soho specific means citizens in legal limits, it shall be approved and registered is engaged in the industrial, commercial, construction, transportation, catering, service and other activities of the individual worker