Eight-character arrangement, each website is different, what's the matter?

It may be because the online four-column eight-character typesetting system of each website is designed by different software developers, and the calculation accuracy standards adopted by each website are different. Some are accurate to the sky, some are accurate to the time, and some are accurate to the minute (such as the International Book of Changes Network, Yuanhenglizhen Network, etc.). ), but also accurate to the second (such as Cindali numerology prediction tool network). If the accuracy is not high enough, there will be errors in judging the solar term time.