Virtual team, a community of two or more cross-regional, cross-organizational people, linked together through communication and information technology, they have complementary technologies or skills, have common goals, have common assessments and work Method, they share the ultimate result and responsibility. According to the above definition, Which of the following situations belong to the virtual team (). ['A publishing house contacted several experts to compile a new textbook. Everyone works in different units, and their work is mainly coordinated by telephone, fax, and Internet.', 'A company recruited two key employees from the sales department, research and development department and production department to form a new product research team.', 'Xiao Li encountered technical difficulties in his work. He was unfamiliar with a certain professional field. He consulted many experts through the Internet and telephone, and established regular and fixed contacts with the experts.', 'Xiao Tang, Xiao Sun, and Xiao Liu often chat online and find that they have similar experiences and have common interests and become good friends.']