The K-line chart is the most fundamental and important tool in technical analysis. Each K-line contains information about the opening price, closing price, highest price, and lowest price. Common patterns such as 'bullish candle', 'bearish candle', 'hammer', 'engulfing', etc., can reflect the changes in buying and selling power. For example, a long lower shadow often indicates that funds are buying at the bottom, while a long upper shadow may suggest increased selling pressure. Combinations of multiple K-lines also have specific meanings, such as 'morning star', 'evening star', etc. It is recommended that beginners observe in conjunction with actual market conditions and trading volume to improve their judgment.