Trademarks can be used before they obtain the registration certificate or are not registered, but they are not protected by law. You can advertise in advance and put the "TM" mark on the upper right corner of the trademark after receiving the acceptance letter to indicate that the trademark registration application process is in progress. The "R" mark cannot be made until the trademark registration certificate is obtained. However, you'd better be sure of getting the registration certificate before promoting your brand, otherwise your promotion will be in vain.