This has a lot to do with the amount of your bid and the bidding method. If the company purchases it by itself and does not involve state-owned funds, then you can buy whatever brand you want, but if it is a state-owned fund project, that is Projects that must be tendered are very particular.
Depending on the amount, different bidding methods will be used. For example, if it is less than 200,000, you can use the inquiry procurement method. This method can specify the brand and model; if the amount is greater than 200,000, If the price is less than 500,000, competitive negotiation will be adopted. This method requires several brands to compete. Similarly, public bidding also requires several brands. If specified, it will violate the above regulations.
So, when it comes to selecting the procurement subject matter, you still need to follow the bidding process if you want to use the system you want to use.
The understanding of this content is to avoid the phenomenon of high price monopoly due to designated brands during the bidding process.