The letter should include specific details like your relationship with the visitor, the purpose of their visit, duration of stay, and financial arrangements. Complete the Invitation Letter form.Fill out the form with correct and sincere information about you, your guest, and the entry and departure date. Students who would like to write their own invitation letters for their family members can use the Sample Invitation Letter template here. Use this sample invitation letter template to help draft your next communication. 1. The visit to the United States will be temporary. Your invitation letter should list the purpose of the visit, i.e. Use an appropriate tone. For example, you could write: "I want to invite you to come visit me in the United States from June 1 to July 7, 2016. The Consulate General of People's Republic of China in Los Angeles will adopt the new requirements for Chinese visa application as the following: