Yin and Yang is like ...

...the chocolate business, you never know when it's going to melt;

US chocolate maker Hershey cut its sales growth forecast for the year, blaming weaker growth in China.

...."Macroeconomic challenges and trends are affecting consumer shopping behaviour resulting in continued softness within the China modern trade," the company said.

Though Hershey is doing fine in the USA. Must be the monetary offset.