To become a supplier, first of all, your own factory should have a certain scale, and secondly, the product quality should be better. When these own hardware are ready, the next step is public relations. It is more formal to send samples to customers in the early stage to verify that the products can meet customer requirements and the cost performance is higher than that of the original suppliers, and then customers will consider changing suppliers. If you have a good relationship with customers, you can make products through public relations, use other suppliers to supply customers, and then slowly squeeze out other suppliers.
In short, to become a supplier of a big company, you must do it yourself and have certain financial resources. Generally, large companies will deduct money for several months, so you should consider this before you do it.
Public relations is also essential. We should have a good relationship with the quality of big companies and try not to report some small problems that affect the quality of their products.