Engaged in rail transit welding processing, High-speed rail parts、 Mining machinery manufacturing、 Processing, Mechanical and electrical equipment、 Wires and cables、 Sales of communication equipment and its accessories, Production、 Sales of cable harnesses, Engage in import and export of goods and technology, Business information and related technical consulting services。( Without approval, no one may engage in or mainly engage in accepting deposits、 Loan issuance、 Settlement、 Bill Discount、 Fund lending、Trust Investment、 Financial leasing、 Financing Guarantee、 Foreign exchange trading、 Financial services such as wealth management on behalf of customers, Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments) Licensed Projects: Labor dispatch services( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business items are subject to the approval results.)