Short-term operation ideas (intraday): Given the obvious weakness on the 15-minute and 1-hour charts, we do not recommend blindly chasing longs. If the price rebounds to around 91200-91500 (short-term resistance level), consider shorting with a light position, with a stop loss above 91700. The key support below first looks at around 90800; if broken, the next target is the psychological level of 90000 mentioned in the news. If 90000 is effectively broken downward, the short-term may accelerate downward, and we should follow the trend.

Medium-term operation ideas (a few days to a week): The MACD death cross on the 4-hour chart is a strong signal indicating that the medium-term correction will continue. We should maintain a wait-and-see or shorting strategy on rallies. If the price stabilizes in the 90000-89500 range (medium-term support level, also near the 4-hour MA10 and MA20) and shows clear signs of a reversal, such as a volume-supported bullish candle, MACD crossing back to the bullish side, etc., we can consider a light long position, targeting 92500-93000. However, if the "lifeline" at 90000 is effectively broken downward, we need to cut losses promptly and adjust the medium-term outlook to bearish.

Long-term operation ideas (a few weeks to months): The daily chart still shows an upward trend, and the overall direction remains unchanged. For long-term investors, this correction is actually a good opportunity to accumulate positions, and they can buy in batches at strong support areas around 89000-87000 or even lower. Key support levels: short-term 90800, psychological level 90000; medium-term 89500-89000; long-term 87000. Key resistance levels: short-term 91200-91500; medium-term 92500-93000; long-term 94000.

Possible reversal patterns: In the short term, if 90000 cannot hold, a larger head-and-shoulders pattern may form, leading to a deeper correction. Conversely, if a W-bottom or bullish engulfing pattern appears near 90000 or 89000, accompanied by MACD bullish crossover and RSI rebound, it may form a short-term bottom for a rebound.