How does 受 work in this context (on the first article)? I just read the following sentence on 人名网 mobile:


  三文鱼寿司是很受中国人欢迎的寿司种类，甚至有不少中国人到日本的回转寿司店也只点三文鱼。


But on web version, the expression is the following:


  在中国，三文鱼是中国很受欢迎的寿司种类，甚至有不少中国人到日本的回转寿司店只点三文鱼。


However, I don't understand how 受 works in the first article. If it is a verb and the whole sentence is a modifier to "寿司种类", then there should be a subject to a verb "很受". 

At least on the second article, I understand that 中国 is a subject and 很受 is a verb, both of them modify 寿司种类 via 的. But on the first article, there is no subject on the "很受中国人欢迎的"... It might not be a verb to begin with, since if I remove 很受, it still seems to make sense (in this case 中国人 is a subject and 欢迎 is a verb...).
The main parts of the sentence is 三文鱼(subject) 是(verb) 寿司种类(object).很受中国人欢迎的 and 中国很受欢迎的 are the modifier of 寿司种类. 

To me, the first sentence is better, because in the second sentence it repeats 中国 twice. 在中国，三文鱼是中国很受欢迎的寿司种类. It could be better to remove the second 中国. 在中国，三文鱼是很受欢迎的寿司种类. 

受 is short for 受到， meaning 'to get or getting'. 

The phrase 很受中国人欢迎的 means 'getting warmly welcomed by Chinese people'. 

As a whole, 三文鱼寿司是很受中国人欢迎的寿司种类 can be translated to Salmon sushi is the type which is warmly beloved/welcomed by Chinese people. 

The subject for 受 is 寿司种类. In fact, it's a passive voice here. That 寿司种类
is 受到中国人欢迎. This is the same as "寿司种类被中国人欢迎". Somehow, 受到 here is the nice way to express “被” I think.