The problem here could be that the OP who is asking for the visa is Nigerian. People from poorer countries have greater difficulties getting a Chinese visa, particularly if they apply outside of their home countries. If the OP were say American or Australian and applying in Italy, it would probably be a piece of cake.
@tigertiger, I'd rather read an official news report than someone's various theories, historical anecdotes or stories about the dangers of the region. All the various news outlets that have reported on the border openings that have occurred previously, went ahead as planned and were thus correct. Unless someone here is a Myanmar immigration officer, I'll believe news sources and so will every other normal person. The news media is thus not "unreliable" as claimed. The only way of knowing for sure is to wait for confirmation from a reliable news source.
Or better yet a Vietnamese speaker as their Vietnamese is better than their Chinese.
However, unless you are a national of a visa exempt country (such as Norway, Russia etc.) it's unlikely a visa-on-arrival has ever been possible at Lao Cai or any other Vietnamese border checkpoint (apart from pre-approved visas on arrival for air arrivals at international airports only). There it's not "still" possible, it has never been possible - get your visa in advance.
I just opened the link and it still works. For more information, please visit ttrweekly.com and click on Myanmar news. Once the border crossing opening dates are more imminent, they will surely post an article on this.
as mentioned the only reliable sources are official news sources not some random posters on gokunming. The Thai border crossings also took about 5 months to open from their originally announced dates. I suspect the same with ruili muse. Nth Laos is irrelevant to this discussion maybe already happened but very few westerners go that way. Lets keep on topic.