How to hang precious metals in ICBC?

Two-way trading of precious metals in ICBC accounts refers to two business models: buying before selling and selling before buying. The two business models are independent of each other and operate separately. If you want to deal with the business of selling before buying, you need to open a margin account. If you only deal with the business of buying before selling, you don't need a margin. In the process of selling first and buying later, when the margin ratio reaches or falls below 50%, ICBC will give customers a risk warning by SMS. When the margin ratio reaches or is lower than 20% and the customer has not closed the position, ICBC can close the position in full. When you say hang empty, it belongs to the business of selling first and buying later.