There is no contract required, no minimum commitment and you can cancel it anytime

无需合同，无需承诺义务，可以随时取消。

youdao

If a new implementation of the existing contract is introduced, then consumers should not be affected and no versioning is required.

如果现有契约的一个新的实现被引入，那么客户将不会受到影响，也不需要新的版本。

youdao

The penalty for breach of contract that the worker pays as required by the employer shall be no more than the training expenses caused in the service period unperformed.

用人单位要求劳动者支付的违约金不得超过服务期尚未履行部分所应分摊的培训费用。

youdao

But several years later when he was required to sign a school contract stating that his daughter would have no access to the Internet, "she thought it was ridiculous, " he said.

WSJ: Stadium Seating for Internet Morals