Harmony and not-rocking-the boat are valued traits in Chinese culture. Go-along to get-along type stuff.
A typical Chinese curse/blessing would be - "May you live in interesting times/have an interesting life".
The key here is the use of 'interesting' - its is a rough translation equivalent to ' non-harmonious, troblesome, turmoil - that sort of condition.
Subtle, but its a sly way of blessing and cursing someone while sweetly smiling at them with gritted teeth.
Which is probably what Hu Jintao did to Kim Jong-il.