Taigong Tiancheng (600392): The main force of the stock experienced a sharp rise from December 2008 to May 2009, with the stock price increasing from over 5 yuan to over 20 yuan, with an overall increase of over 250%. However, the volume of the stock did not increase throughout the entire rise, with most of the time turnover around 2-3%. The largest turnover to date (February 10, 2009) was only 10%. Due to the very small trading volume during the upward trend, it can be determined that the main way to pull up the stock is still to reduce volume (lock up). The main players who use this method of pulling up will inevitably hold a large number of chips in their hands. Therefore, as long as the market environment remains unchanged and the trading volume does not increase, the stock price will continue to rise. Therefore, when the upward trend is formed, investors can easily profit by identifying such stocks and intervening at the right time. Fig 3

Looking at 002202 Goldwind Technology again, the stock price rose from over 15 yuan to 45.90 yuan during its one month rise from November 2008 to September 2009, with an overall increase of over 200%. However, throughout the entire rise, the volume was never amplified, and most of the time the turnover was around 2%. Such a small trading volume increase shows that the main force of the stock has reached a state of controlling the market. It can be confirmed that the main force of the stock is the old main force trapped after 6124 points. Figure 4

It should be noted that stocks that have been pushed up by volume reduction (lock up) should be highly vigilant by investors once they exhibit volume expansion behavior during operation (such as stagnant volume expansion at high levels and obvious selling characteristics on the daily candlestick or stagnant volume expansion after ex rights), as this operational characteristic indicates that the main force has already been selling