Some securities companies link the monthly salary of employees with the number of funds sold, and pay the full monthly salary after completing a certain number of sales. At the same time, some banks and securities companies also give certain rewards to employees who sell funds, which is what you call proportional commission, because banks and securities companies charge commissions for every fund they sell.

Therefore, in the face of others recommending you to buy a fund, it is best to study the past performance of the fund in detail before making a decision. Generally don't trust the recommendation of the staff completely.