Stick to your trading system; even a sharp decline is a time for harvest.

Hello everyone, I am Professor Li. I entered the market in 2015. Over five years, I paid 1.3 million in tuition fees in the market. In 2021, I exited the stock market to rebuild my trading system. In 2022, I started again with 200,000. By the end of 2025, in four years, I achieved 6 million. I am not a gifted expert; I just turned losses into experience and impatience into patience. [Taogu Ba]
I am also an ordinary retail investor. Now I don’t go to work and mainly focus on stocks. I usually study the market and chat with my friends around me, sharing tea and conversations. In the future, I will also share here some of my personal experiences in the stock market, trading mindset, views, research directions, and operational ideas—only things that retail investors can understand and use.

Today, the Shanghai Composite finally lost the 4000-point mark, with the market broadly declining and sentiment low. The total daily turnover in Shanghai and Shenzhen was 2,302.8 billion yuan, an increase of 175.5 billion compared to the previous trading day. During the day, the Shanghai Index first fell below 4000 points and the 120-day moving average support levels, closing with a shadow line down 1.24%. Shenzhen Composite fell 0.25%, while the ChiNext Index rose 1.30% against the trend. Only 662 stocks closed higher, over 4,700 stocks declined. Yesterday, 500 stocks rose; today, 600; tomorrow, 700? Are they trying to ruin the market and break investors’ confidence? But everyone, don’t be overly fearful. As I said yesterday, hold back your hands. As long as you hold your position and keep your funds, such sharp drops are actually good. When the market digs out a golden pit, you can make your move. Big drops and rapid declines are beneficial—better than a prolonged gloomy decline. Keep your hands steady, wait for signals, and repeat: hold back your hands, hold back your hands, hold back your hands…

The market directly broke through the level I drew yesterday. Looking for the next support, GJD previously sold ETFs around 4200 to suppress the index. Now that the market is so fragmented, do you think they will buy back to profit from the difference? See the chart for details.

In the first 20 minutes of the opening, careful investors should have noticed the problem: too eager! It was so bad yesterday, and today it’s a quick rebound. Did you rush in to buy the rebound yesterday afternoon? Quantitative trading? So I immediately reminded in the forum: Thinking about it, some people rushed in recklessly, afraid of missing out on a million. As a result, they were happy for less than two minutes before turning around and scolding others…

The rebound of the market must look at technology stocks, but technology can be both the cause of success and failure! Look at today’s chips, semiconductors, storage, PCB, etc.—how they performed in the morning and how they ended up. Still, the final rebound in the market depends on technology. Pay attention and don’t chase blindly.

Although the market has been so fragmented these past two days, for me and my friends, these days have been a contrarian feast, especially today. Careful followers should have seen my previous posts and focus on “Energy Storage and Inverters in New Energy”—if you missed those, check out posts from the 9th, 11th, 12th, and 15th, which repeatedly emphasized these topics. I am Professor Li, and I only focus on: biomedicine and “Energy Storage and Inverters in New Energy.”
This morning, I rejoined my old friend Shouhang New Energy. He previously helped me make big profits, and today he again hit the daily limit up with strong momentum, though my position is still light (mainly because it’s already risen a lot, so I’m cautious). Zhongneng also hit the daily limit up today (I won’t go into details here; I was hesitant to hold heavy positions because he reduced holdings earlier).

Jinlang’s position is a bit heavier. I analyzed this multiple times in my articles. I’ve been holding it, mainly adding or reducing. Today I reduced some again, and the returns are very good. If you agree with my views and analysis, then following that inverter stock up to today should have been a big profit.

Thanks to Lao Ma for today’s strength: According to Reuters on March 20, citing sources, Tesla plans to purchase about $2.9 billion (roughly 200 billion RMB) worth of photovoltaic manufacturing equipment from Chinese suppliers to support its goal of building 100 GW of PV capacity in the U.S. by the end of 2028. The core potential suppliers are Maiwei Co., Jiejia Weichuang, and Laplace. In March alone, Longi Green Energy signed a 500 MW BC module agreement in the UK, Tongwei signed a 1.5 GW module agreement with European distributors, JinkoSolar secured a 2 GW order in Australia, and China Power Construction signed a 2.1 GW solar-storage project in the UAE (contract value nearly 14 billion RMB). Markets in Europe, the Middle East, Australia, and Latin America are also expanding simultaneously.
Additionally, some biomedicine stocks, based on last night’s plan, entered a position in Blue Sail Medical after the market opened this morning, reaching a high of +8 during the session—unfortunately, it was a fleeting gain.

San Sheng Guojian performed quite well today, confirming its position within the box, with moderate volume pushing further up to resistance levels. Keep waiting for the flowers to bloom. Yesterday, Ji An Da Di, which I mentioned earlier, tried to turn around but was hindered by a poor market and previous profits. Another biomedicine stock from yesterday’s post, today down 1.34% (a normal fluctuation, no big deal, continue holding).

Yesterday, I chatted with Lao Deng, who still hit new highs today. Many people say: “I don’t like Lao Deng—he’s slow.” How to interpret that? Different people see it differently. I always say, in the stock market, slow is fast. Don’t rush; as long as you keep making steady profits. You’ve probably tried many times to chase the leading stocks.

The market is all green, full of panic and panic selling. When others are panicking and fleeing blindly, you must stay calm. A sharp decline is never the end of the world. The overall trend of a slow bull market won’t change, and this is precisely the opportunity for prepared investors. Strictly follow your logic and rhythm—don’t chase highs, don’t fight the trend, don’t let emotions sway you. Only trade what you understand and earn within your knowledge. The contrarian gains of these past two days are both a gift from the market and a reward for sticking to your logic and pattern long-term. With clear logic and iron discipline, I’ve avoided the slaughter and steadily harvested profits.

I am Professor Li. Wishing everyone a red-hot stock market! May all my followers become market champions. Keep it up! If you like my articles, please like, follow, and support. Thank you!

Note: All stocks mentioned above, as well as all analysis, logical interpretations, and operational suggestions in this article, are purely personal opinions and trading reviews. They do not constitute any buy or sell advice. The stock market involves risks; invest cautiously.