Analysis and Strategy Reference:

The weekly chart has just completed its close, with a large bullish candle featuring a long lower shadow. After touching around 4099 at the top, it began to stagnate and retreat. The overall closing position is located in the overbought area of the weekly Bollinger Bands. Although the bullish trend is strong, for the bulls to continue rising, a pullback is also necessary.

Additionally, the high-pressure spike at the end of the year coincides with the high point at the beginning of the year near 4099, forming a double top resistance at the same position. The likelihood of effectively breaking through the upper limit within the week is reduced; even if there is a breakout, it is likely to be followed by a retreat after the spike. [There is a small probability of an upward spike to 4200-4300 followed by a retreat]

Looking at the daily chart, after the small bullish candle with a long lower shadow two days ago, yesterday's close was again a small bearish doji. Overall, the trend is gradually weakening from the intraday perspective. Although there is a short-term recovery on the four-hour chart, with support above 3950, the overall performance is not as strong as expected, so I see the potential for continued topping and a retreat during the day.

In summary: Short-term bias is bullish, but intraday bias is weak. It is recommended to primarily focus on short positions. Reference resistance: 4020, 4070-4090