In this case, first of all, it is necessary to determine whether the service for registering the "Yishubao" trademark is similar to the registered "Yishubao" trademark approval service, because the basis for judging the similarity of trademark composition is on the same or similar goods/services.

If they are not similar, there is no need to consider the problem of literal approximation. Secondly, if the above-mentioned trademark designation services are similar, then the characters of "Yishu" and "Yishubao" are very similar, and there is no obvious difference in the meaning direction, so the success rate of direct registration is low. It is suggested to redefine the trademark or take measures such as similar trademarks before revocation to eliminate the obstacles to rights.