Both the certificate and the double certificate were issued by Jilin University, and finally they were basically the same as the double certificate of my major (the graduation certificate was slightly different). So there are online, but it has little effect on finding a job, and it has no effect on insurance research and postgraduate entrance examination. It's not good to talk nonsense if you don't understand it abroad.

My feeling is that if you have a lot of free time or are interested, you can learn, otherwise don't learn. This is purely personal advice.