Air quality in Beijing is close to being worst in the world, if it isn't already. It is truly awful. Do some google searches on air quality there.
Yes. DH travels for work, and he works with some guys who don't have sensitivities or allergies or any ecological concerns whatsoever, and as soon as they breathed the air in Beijing they went and bought some serious face masks with air filters, just like the Chinese wear there. It was horrendous air.
I am prone to asthma, and I doubt I'll ever go there. It's just too scary.
Are your kids adventurous eaters (will they eat anything put in front of them)?
I have been served chicken feet and lips (no kidding).
From Dh's experiences growing up in Asia and traveling there as an adult, I would agree that that is important. Unless he grilled people, they just woudn't tell him what was in the meals, they liked surprising him (like with dog-meat soup in Taiwan), and even if he was told what things were, he didn't 100% believe them. And he speaks Chinese. But still, the food thing is tough.
Since the OP's children are veggie, well, I'm an adult with a husband who speaks Chinese, and even if the air quality got better, unless I were staying at a Buddhist monastery, I wouldn't trust that food was veggie. And I know full well that there are PLENTY of Buddhists who eat meat every day, so even a Buddhist restaurant might not think twice about fish sauce.
I'd say let them go. Make sure she brings her epipen. They will have two adults with them as well as the extended family when they are in the village.
Her epipen? How about dozens? How many epipens do you bring to make SURE you have enough for such a trigger-filled trip?
Yes. In fact, if you want them to grow up to be bilingual, it's pretty much the only way to do it.
It's a good way, and I personally don't think it's horrible that a 2.5 year old apparently only speaks one language. After all, my son was barely speaking his ONE language at 2, yet he's fine now.
But it's not the only way. Plenty of kids pick up two at once when around two languages. My aunt had friends who were raised in a bilingual household...their parents spoke English and their grandparents (who lived with them) spoke Polish. The grands lived upstairs, and my aunt said that her friends would switch languages as they went up the stairs in anticipation of interacting with their grandparents.
What doesn't work well is when the not-fluent parent tries to speak English and the English-speaking parent isn't around. That's what happened in DH's family. His mom thought she would ruin their English if she spoke Korean, and his dad was in the Navy/MerchantMarines/shipping business and was away most of the time, so the kids grew up fluent in "Konglish", but not Korean OR English. School helped with the English and visits to Korea helped with the Korean, but most of the time they just weren't fluent in either. MIL still hasn't learned, and refuses to speak Korean to her grandchildren even though they want her to. Sigh.
I think you have 2 entirely separate issues here. First is, "Do I let my children go to China at all? Is it safe for them in general, is it healthy for them in general, etc". The second is, "If I decide that China as a country is someplace I'm ok with my children being, am I ok with them being with their dad and the new woman and their child?"
From what it sounds like, the father is trusting the wife/gf (I'm not sure which she is) on all things about this trip and he won't put in any type of research about what its like for non native visitors. That he'll say "Oh we're with her so it's all good."
You say that he's not the greatest father to the kids in their "normal" life, so that leads me to believe its not going to change over there. I doubt the kids would be accepted or get any attention from the new wife/gf's family especially since there's a baby in the mix that's actually related to them going. I'm not trying to stereotype here, but I just doubt in a rural setting and upbring that will fly with them.
A trip to China probably sounds amazing to your kids, especially since it's been hyped up to them over the years and they might be thinking "OK cool trip with daddy finally!" but they can't logically think this through. Let me ask you this OP...do your kids ever call you when they're with their dad and say they want to come home? Can they go for long lengths of time without talking to you? If they go, they'll be in it for the long haul.
In the same vein, can the father deal with them for the whole length of the trip? How long is he used to having them vs how long this proposed trip will be? Is he going to get annoyed or resentful having them along?
I think you have to set aside some of the emotional stuff here and look at the more factual things. If you think he can safely take care of them and they would have fun, maybe you need to step aside and let them go. If you think they'd truly be in danger, or that the family dynamic over there would kind of exclude your kids, that's different.
I agree with everything, especially what I bolded. Knowing how DH was treated in Asia (and he's lived in Korea, China, Singapore, and Taiwan (yes I know China feels Taiwan is China, but Taiwan doesn't) and how he is treated even as an adult traveling on business there now, even as someone who is half Asian), there will not be acceptance of your kids.
And about the father dealing with them, omg such a good point. My dad did visitations more than it sounds OP's ex does, but even he couldn't handle anything out of the ordinary. I once got sick on a weekend visit, and he made my mom come get me in the middle of the night. He couldn't handle it at all. When he came to us with grand plans to take me (not my brother, just me) to Guatemala, my mom nixed it fast. He didn't have any sort of background in actually being able to CARE for us, he just *watched* us, so there was no chance that we were going out of the country with him.
Wait until they are adults. He can start saving now for a grand tour then.