Spark's commercial is ringing. During the summer vacation, 0 yuan invited me to class. I was asked to pay for the first few classes. A dozen students have classes together. I asked my son that many students have very different grades. What's the difference between this and school? They will still do it, but they won't. Later, after studying happiness for a while, I obviously felt different. The teaching of classes one to four will be more targeted according to the results. The son said that two hours is obviously efficient, and the price difference is not big, so there is a gap!