What are some pros and cons of grandparents caring for their grandchildren?

Pro - Family cares for family - don't need to pay strangers to care for your child.
Con - Nasty Kunminghua is passed on to the next generation.

*waits for the bait to be taken*

I don't kunming hua is nasty. Sure it's not easy to understand but I would love to be able to speak it and show off. Learning a dialect is rather special in my opinion.
Con- They don't set boundaries and let the kid do whatever he/she wants. They spoil them.
Pro-Grandparents here truly love their grandkids and give them love.

Preserving any part of the culture is important. Having a kid who knows 4 languages will also be beneficial to herself or himself in the future

As heavy family-grandparent involvement in raising a child is a Chinese cultural tradition and custom, I feel that those of us who choose to marry a Chinese person, should be willing to adopt to that culture, rather than trying to change it.

By the same token, shouldn't the Chinese spouse be just as willing to adopt the "foreign" culture rather than trying to change it, since they chose to marry a foreigner?

Tony, don't fall into his trap. Pros and cons has nothing to do with trying to change another person's culture and no one here is stating that anyone must change or is wrong.

Correct me if am wrong but is mm even married to a chinese woman?

One of the huge benefits of growing up in a multicultural family where one doesn't try to impose more than the other, is that the kids freely inherit from both sides. This helps them have unbiased views and opinions of both sides without having the attitude and sense of cultural and racial superiority that those who aren't multicultural might have.

yankee00, that is very well-said actually.

Hugo, give it a rest, dude.