How to set up zero balance of GL in SAP

Dear, I need few minutes of your time, our company on SAP is working with 6 company codes out of that 1 company is sold but we have to keep continue that is SAP with zero balance of that company now I have to set all the GL account to zero and start the company from zero, now please give me your expert opinion about this or if you can refer me somewhere else that would be helpful