1. Supply capacity: that is, the quantity and stability of xylene that suppliers can provide. This is one of the most important indicators when selecting suppliers, because it is related to the implementation of the procurement plan and the improvement of production efficiency.

2. Product quality: The quality of xylene is one of the most critical factors in production, therefore, the product quality of suppliers must be guaranteed. Quality problems may lead to production line stagnation and product quality decline, which will have a serious impact on enterprises.

3. Price: The price of xylene is one of the important considerations in enterprise procurement. Although price is not the only indicator, suppliers' prices must be competitive in the market in order to meet the cost control needs of enterprises.

4. service: the service level of suppliers is also an important factor that enterprises need to consider when choosing suppliers. The services provided by suppliers should include product consultation, technical support and after-sales service to meet the needs of enterprises.