We will always guarantee to our customers: if you are not satisfied with our specialists' lessons, you would get a full refund — it is our unswerving pursuit to maximize customers' value.

我们对客户始终承诺：对专家讲课不满意，现场全额退款！——客户价值最大化是公司始终不渝的追求。

youdao

We will always guarantee to our customers: if you are not satisfied with our specialists' lessons, you would get a full refund — it is our unswerving pursuit to maximize customers' value.

我们对客户始终承诺：对专家讲课不满意，现场全额退款！——客户价值最大化是公司始终不渝的追求。

youdao