Marshmallow for 6 plus pe-ul00?

Hi guys. Are there any news about official marshmallow for the chinese version of Honor 6 plus? I'm talking about the pe-ul00. On the emui site the last stable version is b351(lollipop) and the last beta is from january. Right? The only update that seems available is that I can find by hicare app. It's the B550. Is it marshmallow? Is it stable or a beta?
I'd like to update but I think nothing official came out. Do you have some informations?
Thanks guys

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