What is the level of volunteer teaching in Winter Olympic Cloud?

Volunteer is a name without national boundaries, which refers to a person who provides services, contributes personal time and spirit to improve society without any material return.

Voluntary service generally refers to the act of providing non-profit, free and unprofessional help to neighbors, communities and society by using one's own time, skills, resources and kindness. Volunteerism: UN Secretary-General Kofi Annan pointed out that the core of volunteerism is the ideal of service and unity and the belief of making the world a better place. In this sense, voluntary service is the ultimate embodiment of the spirit of the United Nations.