But it should be combined with the company's financial resources, because the whole ERP needs several million. The world-famous ERP service companies are ORACLE (Oracle Bone Inscriptions) and SAP.
Companies in China include UFIDA and Kingdee.
If the company really needs to improve the system, but does not have a lot of money, it can consider building only systems that are important to the enterprise, such as buying only financial systems, which can save a lot of money. I hope it helps you.