In fact, the general raw material manufacturers are concentrated in coastal areas, and the technology and materials will be updated faster. In Shenzhen and even the whole country, "Lian Jian, Abison, Yida, Ruituo and Cai Liang" are all well-known manufacturers, and they all have national offices to serve in various places.
By the way, make an advertisement, hehe! I am familiar with Shenzhen Cai Liang Science and Technology, and have been engaged in wholesale production of LED display for nearly 10 years, which has great advantages in quality and price. After-sales and service are very good.
Other manufacturers are also very good, mainly focusing on after-sales service and communication with customers.