The three groups that maintain fund operation are fund parties, market service agencies, regulatory agencies and self-regulatory organizations. Fund parties not only refer to share holders, but also include fund managers and custodians. The service agencies of the fund market include sales agencies, payment agencies, valuation accounting agencies, rating agencies, consulting agencies, information technology service agencies, lawyers and accounting firms, etc. The capital market is most prone to the problem of interest transfer, so whether it is the stock market, the bond market or the fund market, there are relatively strict and standardized regulatory agencies and self-regulatory organizations.