I took my children to Jinyuan for a trial yesterday. We listened to one of the two patented teaching methods, called Yugen Pinyin. I felt that the course was pretty good, because after the trial, the children dared to speak on their own. Having said that, I listened to the lecture very seriously. The other one seems to be called Yugen Zhiyi, and there is a grammatical sentence pattern at the end. We plan to sign up after taking a few trial classes. Children aged 6-14 can learn it. Our Xuanxuan is 7 years old this year. I hope my answer can help you.