Article 18 revocation of offer an offer may be revoked. The notice of revocation shall reach the offeree before it has dispatched a notice of acceptance.

第十八条要约可以撤销。撤销要约的通知应当在受要约人发出承诺通知之前到达受要约人。

It finds that right of offer revocation lead to awful problems in two hands.

或者说要约撤销制度存在什么问题吗?。

Article 18 an offer may be revoked. The revocation notice shall reach the offeree before it has dispatched a notice of acceptance.

第十八条【要约的撤销】要约可以撤销。撤销要约的通知应当在受要约人发出承诺通知之前到达受要约人。