Actuarial dogs pass by, let's talk about actuarial certification first. The main certification systems are North American Association, China Association, British Association, Japanese Association and Australian Association. At present, it is common in North America, Britain and Australia and can be interchanged, while China's actuarial certificate can only be certified in China, and others are not recognized. Therefore, the international certification mentioned by LZ is the most extensive North American actuary certification in the world, abbreviated as FSA/FCAS. Let's talk about the requirements of mathematical ability, mainly mathematical statistics, stochastic process, and some advanced mathematical content plus financial insurance theory. Although the difficulty is not as great as pure mathematics, it should not be underestimated. Whether you can learn 1 well depends on the mathematical foundation. If there is no foundation, you have to work hard the day after tomorrow. Finally, let's talk about the difficulty of obtaining FSA/FCAS. Let's mention the numbers. As of last year, there were about 300 financial service companies in Chinese mainland. Brief introduction, LZ reference.