Wow. What is it likely to mean in the long run
Rimbaud - and anyone else with informed opinion on China?
It is hard to say - bear in mind that these kinds of protest happen quite often in China, although I suspect the ferocity, tenacity, and determination of this one might be related to Hong Kong protests having some success. Also, this was related to a specific issue, namely building either a crematorium or an incinerator in the town, which residents had previously been told was some kind of ecological park.
However, there is obviously more at play than a mere crematorium. There's been a lot of over-construction of housing in order to keep GDP figures high, and a lot of people have been sold false promises about buying some apartment in a kind of crappy town being an amazing investment. I imagine the people protesting are people whose families have sacrificed a lot in order to afford a small apartment in a small town, and have been told a lot of lies by property developers and local government along the way. And now not only have property prices failed to increase as they had been promised, but now the local government again lied to them about building an ecological park when they were building a crematorium, and in China nobody would be happy about living close to a crematorium so everything they and their families invested to afford a home would lose all its value.
On top of it, the people protesting are basically working class and probably have relatively low incomes by the standard of Guangdong province (which is one of the most prosperous parts of China) and there are a lot of other economic pressures they are facing too - namely the price of pork, the default meat of China has skyrocketed, and the economy is generally in a slowdown, so they would be facing these pressures too.
I think it's unlikely that they would have identified with the slick and arrogant (in their eyes) Hong Kongers at first, but in one of those videos they are wearing hard hats which points to some influence and after battling with police themselves I can imagine them feeling increased sympathy to HK.
As for what it means - these sorts of thing are only going to multiply as the economy gets worse and house prices start to fall. Xi Jinping has also effectively broken the Chinese government by making the reporting of any bad news impossible, which is why they thought they'd win in the local elections in HK, and why the swine flu spread so bad - people tried to cover it up instead of reporting it. I think the Emperor being told only what he wants to hear is also why China at present seems to be systematically destroying its international relations and seems oblivious to how it is hurting its own interests. So on top of the innumerable economic problems of China at the moment you also have an out of touch leadership living in an echo chamber who are probably going to make things even worse.
In short - things are going to get nasty. I left China nearly 2 and a half years ago, and I started to feel like things were going to get nasty since about 3 years ago - events since seem to have confirmed my intuition. You see the explosion of pent up aggression in the above videos - OK, now imagine what it looks like when the property bubble finally bursts and hundreds of millions of people in every township and county and city find that their life savings of several generations, which they were encouraged to invest in property in order to keep the bubble rolling as long as possible have been suddenly wiped out. It isn't going to be pretty.