+1 to Graham's very current assessment.

Lain, you clearly have been working from extremely outdated or nonstandard materials. The MCM thread on getting a Chinese motorcycle license includes the latest information, as well as offers by me to provide the universal question bank (in Chinese and English) that was official until 1 January when a new question bank was promulgated. You'd do well to spend time with materials that are as current as possible. There are a few questions that beggar logic, but actually not that many. Most of the questions are perfectly sensible. One hopes that the new question bank harmonizes even more with international practice.

You'll also see in the license thread that some guy is offering the new question bank in Chinese only for 1 rmb on Taobao. This is probably where Graham's wife found her copy. Given that your wife also reads Chinese, this could be your best option at the moment for learning current law in preparation for getting a license.

As ever, advanced search is your friend. The things you are hypothesizing about are largely covered in the MCM archives.

Good luck to you.