How does ICBC realize the ex ante risk control of trading business?

What is the degree of ex ante risk control mentioned by ICBC? Whether it is a full transaction or a partial transaction, whether it is an ordinary transaction or a derivative transaction. At least I know that some investment banks have a certain degree of ex ante risk control, but it is true that the scale of ex ante risk control business is smaller than ex post risk control. These rules are composed of different degrees, such as laws and regulations (inviolable), industry norms, company norms, fund norms and so on; The subject can imagine the whole process as a water supply system, and each rule is a valve (indeed, it is similar to this analogy in procedure). Whether to accept or reject the transaction can be verified by setting the valve. The main contradiction of pre-risk control lies in the contradiction between the need to quickly confirm the transaction and the time-consuming rule check; Therefore, there are often fewer risk control rules beforehand. Modern financial market transactions usually require high timeliness. For example, in the trading of foreign exchange, securities and commodities, the market is continuously traded, and the transaction price is rapidly changing. Traders need to trade at the right time. System delay may affect transaction efficiency and thus miss profit opportunities. As a result, in financial transactions, the implementation of prior control requires extremely high business management mode and system operation efficiency, and it is very difficult to implement, so in the past, the risk management of international financial market transactions was usually after the transaction was reached. From the perspective of risk prevention and control, this kind of ex post control has great limitations. Especially in recent years, the "black swan" operational risk event has appeared in financial institutions at home and abroad, which has had a great impact on the operation of related institutions, which further highlights the necessity of ex ante risk control of financial transactions.