Yes.
From what I understand the Apple Store in Kunming is a fake store selling genuine merchandise. But there are lots of other places selling apple. It may be better going to the bigger stores, and not the cyber marts, to reduce the risk of getting a fake Apple product.

But I would also recommend Hong Kong. The prices are much cheaper and HK is great to visit.

Having been to none of the above I can only comment on what I have heard.

Cambodia is beautiful and everyone I know who has been there runs out of memory cards for the camera. Lots of photogenic temples and buildings.
Laos people are very friendly and polite, everyone I know who has been around Asia rates it as the nicest place they have ever worked.

Vietnam I have also heard great things about.

It is often the same with any budget airline. Unless you have booked a connecting flight with the same airline, then no joy.
Part of the problem is also Beijing airport. Even Chinese people get lost there, the signage is abysmal.

There is only one cure, fly to Beijing the day before, book a cheap hotel and enjoy a bit of the city. I always do this, no matter which airport I am exiting China from. I also makes life a lot less stressful.

@bradlevine, where do we begin?

Off the top of my head.

Much fresh fruit and veg is treated with chemical pesticides and other chemicals to enhance the product.
Pesticides may be used right up to harvest. Be especially careful with carrot, always peel as the skin is very good at absorbing chemicals.
I think I read last week that farmers were spraying crops with formaldehyde to prolong freshness at market, and these are the little farmers.
Some farmers still use human sewage as fertilizer with carries a risk of e-coli.
The veg is washed before it gets to market. This is often not in clean water, but in local gullies and streams. Even the water they spray on at the market may not be from a tap. If it is from a tap is the water drinking water?

Beyond fresh produce, there is more of the kinds of foods you buy in the wet markets that have been affected.

Fake rice.

Fish.

Turbot that was treated with too much fish fungicide to be safe, even for China.

There is a popular yellow belly fish of high value. Other species were having the belly colored yellow with industrial dye.

Meat -

Fake beef, made from other meats by treating with chemicals. In one case duck was treated with urine to make it like beef.
There was also a case where condemed pork was then treated and frozen to be sold as that thin sliced lamb that goes in hot-pot. This was also sold on to muslim meat vendors without their knowledge.

In answer to the original questions. Yes, no doubt about that.

The food is not safe (not even fresh foods) and therefore not healthy, even though the diet is arguably more healthy.
If you do become ill the health care on offer is not as reliable and often not as good.that

Then add to this general levels of stress will be elevated, increased water-born diseases, and a liberal sprinkling of water/air pollution.