Article in English: If the ratio of high cards to low cards is higher than normal (that is, there are lots of high cards still in the shoe), the player can make bigger bets to increase the amount he/she can win when the deck is favorable. They keep a number in their heads that tells them when to bet and how much to bet -- or not to bet at all! A deck with a positive number is good. The higher the number, the more you want to bet. The higher the number, the more high cards are left to be played. To track the ratio of high cards to low cards (thus knowing whether the deck is in your favor or not), you'll need to assign the cards a value. Start at 0 and as each card comes up, add it to your tally.  Cards 2-6 have a value of +1. Cards 7-9 have no value. Cards worth 10 have a value of -1. Aces also have a value of -1. Increase your bets when the count is running positive (that is, about +2 and above). The higher the count, the more you should bet, but keep in mind that if you range your bets too much, you might draw some heat from the casino. Generally speaking, you want to increase your bet by a unit of 1 for each point that the tally goes up. If you do it any more drastically than that, those eyes in the skies will be on you like a hawk. Grab a complete deck (sans the jokers) and rifle through it, keeping track. You should end up at a very round 0 if you've counted the cards accurately. Aim to get through the deck in under 25 seconds. That way, even Dealer McSpeedy won't get by you.  Start timing yourself when you can get through the deck and end up at 0 every time. Even though the math is very simple, it's easy to get side tracked. Don't be surprised if you end up with a different number consistently in the beginning stages. Take a card out and leave it face down. Run through the deck and get your tally -- what's the unturned card? If you look at a jack and a 4, your thought process should not be, "-1 and +1 = 0." It should simply be, "0." When you see a low card and a high card, they cancel each other out. Keeping this in mind...

Summary in Chinese:
理解高低牌策略的计算方法。 确定牌的数值。 了解相应的赢面概率。 测试你自己。 把一张大牌和一张小牌一起记。 保证最后的总值计算正确。 在有干扰的情况下练习算牌。