The pin on the four-hour level looks at today's low support position. After the pin is over, the rebound will focus on the first line of 60,000, and the second line will focus on the line near 61,600. In the short-term trend, if the 61,600 line is not broken, it will form a short-term resistance position. It may form a resistance position near 61,600 and then fall back to implement the support point of the 59,000-60,000 range.