2. In recent years, with the expansion of fans and the continuous development of idol economy, many ways have emerged, such as buying peripheral products for idols, renting advertising space for publicity, voting, and doing public welfare activities. At present, the entertainment circle composed of idolized fans has gradually developed into an organized and professional interest circle.
3. According to the main business items, surveys can be divided into two categories: commercial surveys and non-governmental surveys.
4. A business investigation company refers to an investigation institution engaged in business investigation, mainly including business investigation companies, market investigation companies, anti-counterfeiting investigation companies, intellectual property protection companies, business information consulting companies, insurance fraud investigation companies, anti-commercial fraud companies, economic information investigation companies and public opinion investigation companies. The clients of business investigation companies are industrial and commercial enterprises, government departments, social organizations and other institutions, and only accept business investigation entrustment. Commercial investigation companies usually do not accept the entrustment of individual customers to investigate personal affairs.