Need to see the relevant documents. According to the announcement issued by Nanchang Municipal Bureau of Commerce in 2022, enterprises and units contracting overseas engineering projects need to obtain the qualification certificate of foreign labor cooperation issued by the commercial department and put it on record in order to ensure their personal safety and legitimate rights and interests abroad. Linyi Liancheng can only know whether it is unreliable by checking whether the relevant documents are formal or not. Labor service abroad, also known as labor export, refers to the provision of labor services or services by labor exporting countries (exporting countries) to labor importing countries (importing countries) in order to seek economic benefits and obtain foreign exchange income.