The access control system is directly purchased from the manufacturer

To some extent, the service level of agents and engineering firms in engineering will actually be higher than that of manufacturers. In terms of price, it may not necessarily be lower than the prices of agents and engineering firms, because if the manufacturer messes up the price system, there will be no agents or engineering firms working for the manufacturer. So, you often see that the prices of mobile phone specialty stores are actually higher than those of some sellers, which is the same reason. In addition, there is another benefit of purchasing from agents and engineering companies. If one day the agent or engineering company has problems and cannot continue to provide services, you can also find the manufacturer to continue providing services. In this way, after-sales service has two guarantees. On the contrary, it is very dangerous for some small manufacturers to sacrifice the interests of agents and engineering firms to cooperate with you while buying products for immediate benefits. He is likely to do little and be eliminated by market competition.