The screenshots shows only 6 suggestion hosts. Any chance news.sina.com.cn is hidden further down?

No, that's the last thing on the list, the screen doesn't go any further down.

And sorry for not asking this earlier, but you have turned host restrictions on, right? 

@jkral: What's the current implementation? Do will still host restrict? I'm a bit confused because snippets-internals says "Both personalized and non-personalized". 

Funny. I need to ask Raghu about it.

By default, host restriction is on. It is not easy to switch off.

The locale en_GB does not enforce only articles in English. It gives articles popular in the given region. Still it is weird that such an article would become trending in the whole UK. Even more weird that it comes not from one of the given hosts. Thought the restriction is strict.

Nicolas, have you ever visited news.sina.com.cn?

I visited it, yes. It has 4 entries in my history: 3 in January and one 2 weeks ago. It's part of a bunch of sites I visit as part of a testing script. Maybe my account is categorized as "test account" and that's the kind of stuff test accounts are into?

But anyway, snippets-internals says that my snippets are not restricted. It turns out that the command line flag to not restrict was set on that device. My bad. Removed it and it's all right. Closing this bug as it's working as intended. Thanks for the help!