Legitimate Visa Service

Since I live in Florida, I cannot apply in person for a tourist visa. I will need to use a service that specializes in obtaining visas. I notice that there are several to choose from. I would not want to send the original passport to someone and not know if they are legitimate. Do you have a recommendation of Visa service providers for the China Embassy/Consulate in Houston? Easy China Visa Company on 10628 Rockley Rd, Houston, TX has good price; are they reputable? Any suggestion or recommendation is welcome.
Thank you, Edith