In the 4-hour chart, a consecutive positive rebound broke the weak decline and returned to the mid-track shock. Judging from the closing situation of the K line, the short-term rebound is still strong. The hourly chart rebounded based on the downward test of 67.70, and stabilized the upward trend from 69.50. The 4-hour chart reversed the weakness. In the short term, focus on the resistance of 73.50-74. Today it is recommended to go long on callbacks