Mandarin tutor one-on-one in Neihu for a 5yr old child

Hello. I am looking for a long-term mandarin tutor for my 5-year old son. Classes would be twice a week and one-on-one. He already speaks some mandarin, but could need more practice. The classes don’t have to follow a strict curriculum but should rather be taught in a playful way. Nearest subway station is Xihu (about 5min walking). Looking forward to hear from you!