Of course you have to buy 150 176. This is the code of B. Use your stock account to buy it, otherwise you can't buy it. This is a graded fund. 16 183 1 is a parent fund and a general fund. 75 is a low-risk class A with fixed annual interest. Class b pays interest to class a, and the rest of the income belongs to class b, that is, borrowing money from class a in disguise and adding leverage.

If you don't understand, sincerely welcome questions; If I am lucky enough to help you, please adopt in time! thank you