Review on Garmin Chinese website, user / password is not allowed in China

Hi, some time i receive review a notification from my application like this

[email][email protected][/email]
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Hello Riedid...FRANCE,

Your app, DoubleFace, received 1 new review(s).

Click here to read your reviews.

Cdwangyz (5 out of 5): ???test?????????????
When I click on the link, I leave on this link https://apps.garmin.com/en-US/apps/1281eb95-f480-4b7f-9c82-f8350461b873, but the comment is on
https://apps.garmin.cn/en-US/apps/1281eb95-f480-4b7f-9c82-f8350461b873

On the https://apps.garmin.cn link, I have no user / password to reply to reviews.

Why my user is not allowed to login on this site.

Didier