The Wig model refers to the conversion of some people's wisdom, knowledge, ability, and experience into actual benefits through the Internet. They solve problems in technology, technology, work, life, and school on the Internet to allow knowledge, wisdom, and experience. , Skills generate economic value. According to the above definitions, Which of the following are Wiegand models:. ['An IT technician actually started a small company in his spare time, mainly helping others repair computers remotely on the network.', 'A college graduate opened a clothing store on a B2C website, and used his network resources to make the online store profitable soon.', "The photography works on a photographer's personal website attracted a large number of netizens to browse and repost. Later, the photographer relied on publishing photographic equipment ads on the website to bring a lot of income.", "A non-profit website set up by a university student to answer primary and secondary school students' learning questions for free has been well received by students and parents. A local education has expanded the size of this website to help more students."]