It depends on your theme. There are many conditions for double-degree admission in the School of Economics. You can go to the website of the Academic Affairs Office of Xiamen University to find the notice about the annual double-degree enrollment. What majors are there and what are the admission conditions for each major are clearly written. Oh, I also have a double major in economics. I graduated this year, which is the only major in the School of Economics to recruit double-degree students from other schools. There is no detailed division between statistics and finance, only economics is a big category, and its courses are quite extensive, including finance, statistics, finance, economics, international trade, micro-macro, accounting and so on.
I still hope you can find authoritative information on the website of Xiamen University Academic Affairs Office. The enrollment of colleges and universities is different every year.
Accounting in Xiamen University belongs to the School of Management, not the School of Economics. I have a double major in economics, and I only know more about the scholastic ~
Students with different majors in the School of Economics can of course take double degrees. For example, Wang Yanan University of Economics will recruit some majors (not all majors) in the School of Economics. I have a classmate from the School of Economics, majoring in law, mathematics, journalism and advertising.