It is not free. According to the inquiry of Meituan official website, it is not free for the person in charge of Meituan Optimization to call the customer, nor is it free for the person in charge of Meituan Optimization to call the customer. The person in charge of the US Mission can choose to use the third-party SMS or online communication tools to communicate with customers. If you need telephone communication, you need to bear the related call charges.