This kind of fluctuation during the day has long become a norm. Although there is fierce debate between bulls and bears, the market remains within a range, with ultra-short-term trading as the standard. Don't think it's insignificant; it's all paving the way for what's to come.

In the short term, the short-term resistance is at 752-755, with strong resistance at 760. Following the principle of "not breaking to establish," continue to short at high levels in the afternoon. Watch the 740-730 zone below; if it doesn't break, switch to long positions.