Private cloud app is fraud. According to relevant data, criminals use the popular mobile social media application software to find victims, make friends and fall in love, and use social media to make up the illusion that they are successful people, rich people with frustrated feelings and families, and investment experts, so as to gain the trust of victims. After gaining the trust of the victim, he commits fraud on the grounds of recommending and guiding the victim to invest in stocks, gambling, futures, blockchain, movies, virtual currency, etc.