I. Market Recap

1. Prior price action: After dipping on Friday, it rebounded. On Monday, it probed the bottom at 3960 and rebounded to 4040. On Tuesday, it retested around 4000; after breaking below 4040, it rebounded to 4080. On Wednesday, it broke above 4080; in the morning it accelerated to 4140. In the evening it pulled back to 4100, then surged to 4166. In the early hours, a reverse adjustment appeared.
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2. Current status: The market overall shows a strong rebound characterized by higher lows and a breakout above the highs. It is still within the rising channel formed by 3960–4000.

II. Key Support and Resistance Levels

1. Core support:
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- 4100: The final breakout starting point of this leg up. It is key for judging whether the rebound can continue. As long as it has not been lost, the rebound trend remains unchanged.
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- 4080–4060: If 4100 breaks, this zone becomes the next important support and also the lower boundary of the rising channel.
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- 4040: A previous key watershed. If it breaks, this rebound is likely to be over.
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2. Potential resistance: the 4180–4200 area.

III. Trading Logic

1. Before 4100 is broken, the overall approach is mainly to go long on dips, setting up long positions based on the support levels.
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2. If 4100 breaks, short-term long positions should be avoided; wait for the pullback to stabilize above the 4080–4060 support before considering going long on dips.
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3. If 4040 breaks, the rebound trend of this cycle ends. You need to adjust your thinking and focus on the subsequent downward market.