Chinese tend to vote National so they should be welcomed.

That said, I don’t see why predominantly european countries should ever voluntarily agree to become minorities. The Dalai Lama is hardly going to agree it’s a good idea to allow in greater numbers of Han Chinese, for the simple reason the Tibetan culture will be marginalised. Europeans should also look to protect their culture by managing immigration carefully to ensure integration rather than displacement of the host culture(s).

Also, I doubt that the Chinese are likely to look kindly on welfare & treaty payments :)