Watermelon maker is an online programming education institution. Their teacher is very stable, will not change at will, and is very human. The teaching and research teams are all from Harvard University, Columbia University and other famous Ivy League schools and 985 schools. Moreover, the speaker is Sean, the only champion lecturer in the market, and will not change at will, which can guarantee the quality of the course. It is precisely because of such a strong faculty that the quality of teaching can be guaranteed. Children can successfully pass the exam and get the certificate in less than half a year.