WHAT DOES CHINA VISA TORONTO INVITATION LETTER MEAN?

(three) A letter of consent on foster treatment issued via the trustee living in China who's got agreed to provide foster treatment services as well as a photocopy of the ID with the trustee.We are planning to stop by China in July to go to our son, a Canadian studying in Beijing. Really should we get an L visa or an S2 visa? And given that He's no