Is Dong Ze's Mathematical Space Thinking Legal?

Dong Ze Mathematics has 70 copyright patents, and China Online has more than 1000000 students a year. All the teachers of Dong Ze Education Platform graduated from 985 and 2 1 1 colleges and universities, with more than 15 teaching experience. At present, more than 1 10,000 students have no complaints, which has been well received and actively recommended by many parents.