Visit with friend from Thailand

Hello,
I'm looking to book a China Tour where I'll be flying from the US, but would like my friend from Phuket, Thailand to meet me in China and join me on the trip. The trip will last approximately 20 days; beginning in Hong Kong, and visiting Shanghai and Beijing as well. I know I'll need to apply for a tourist Visa, however, I'm unclear as to what my friend would need in order to join me. Thank you. - Jeff