There is no specific standard value for the limit of trademark registration similarity that constitutes infringement, but a comprehensive assessment based on specific circumstances and legal requirements.

In trademark infringement cases, the following factors are usually considered:

1. The overall similarity of the trademark: The overall appearance of the trademark, similarity in sound and shape, etc. will be considered. If two trademarks are very similar overall, this may increase the likelihood of infringement.

2. The domain similarity of the trademark: whether the goods or services involved in the trademark are similar. If the goods or services covered by two trademarks are very similar or identical in nature, purpose, channel, etc., the possibility of infringement may increase.

3. Trademark recognition and popularity: If a trademark has a high degree of recognition and popularity, even if it has a certain degree of similarity with other trademarks, it may constitute infringement.

4. Possibility of consumer confusion: Determine whether the use of similar trademarks will cause consumer confusion, that is, whether ordinary consumers will mistakenly believe that the two trademarks have the same source or are related.

5. Other relevant factors: Other factors will also be considered, such as the intention of the trademark owner, the use of the trademark, market impact, etc.

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