3D span is a concept mentioned by China, which refers to the value of the largest number minus the smallest number in the current lottery number. In 3D, the number of odd span values is slightly larger than that of even span values, and in the long run, the number of odd span values will be slightly larger than that of even span values. You can cooperate with other methods to optimize concentration, make a reasonable betting plan according to your own funds, or make a good betting plan in the form of chasing numbers. 3D According to the number of numbers contained in each span value, we can clearly see that the five span values of span 3, 4, 5, 6 and 7 account for the largest proportion of the total number. This gives us the conditions to study the span value in groups. Extended data:

Arrangement 5 Trend Chart _ Common indications of hot temperature and cold temperature: Hot number, warm number and cold number are not fixed numbers, and the number of notes changes with the trend. Neighborhood Solitary Pass: Neighborhood number, orphan number and pass number are not fixed numbers, and the number of bets changes with the trend. Multiple spacing: the number of multiples, spacing and median is not fixed, and the number of notes changes with the trend. Missing value: refers to the interval period number of a number. There are three common concepts of missing value: ① Current missing value: refers to the number of periods that a number has been separated from the last interval. ② Maximum historical missing value: refers to the longest historical interval of a certain number. For example, the second place of Rank 3 is 4, and its longest historical interval is 63, so the maximum missing value is 63; ③ Average missing value: refers to the average number "Rank 3" opened 1 time since the lottery, and the calculation formula is: average missing value = total number of lottery periods ÷ total number of times the number has been opened.