Upon acceptance, does this offer form the basis of a binding contract?

一经承诺，该要约是否构成一份有效力的合同呢？

youdao

Please note that your counter-offer is binding for seven days.

请注意，您的反要约是有约束力的七天。

youdao

Please note that your counter-offer is binding for seven days.

请注意，您的反要约是有约束力的七天。

youdao