Our billing method is somewhat different from the billing method on the market. Most of the billing methods on the market directly calculate the traffic that each user passes through their servers, which will consume more than the actual amount of traffic consumed by the customer accessing the target. The bandwidth we charge for is the sum of the amount of data transmitted to and from the target site: request header + request data + response header + response data. We charge based on the actual data returned by the operator, so the same request will consume less traffic than others.