Whenever South African officials meet their Chinese counterparts to talk trade, the issue of the imbalance in China’s favour is almost certainly raised. But a discrepancy in the data from the two sides makes it hard to assess the trade gap. The latest Chinese customs data suggests that South Africa actually holds a surplus – exporting more to the world’s second-largest economy than it receives in return. According to the numbers from Beijing, China recorded US$30.58 billion in imports from South...