Fund: The project was supported by the National Natural Science Foundation of China (Grant Nos. \!11461008; 11761014), the Guangxi Natural Science foundation (Grant Nos. 2016GXNSFBA380035; 2017GXNSFAA198243; 2018GXNSFAA281016), Open Foundation for Key Laboratories and Statistical Models in Universities of Guangxi (Grant No. 2017GXKLMS002) and the Youth science Foundation of Guangxi Normal University (The study of ruin problems based on dependent risk models). |