How can you write a letter of invitation for your son to visit you in Taiwan?

To write a letter of invitation for your son to visit you in Taiwan, start with a warm greeting and clearly state your intention to invite him. Include details such as the duration of his visit, the purpose of the trip, and any specific activities you plan to do together. Make sure to mention your address in Taiwan and express your excitement about having him visit. Finally, offer any assistance he may need for travel arrangements or visa applications.