In the early days a joke circulated around Beijing in &quot;China hand&quot; circles as follows:<p>What&#x27;s the difference between a Hong Kong Chinese and a mainland Chinese?<p>The Hong Kong Chinese knows the difference between 1&#x2F;100th and 1&#x2F;1000th of an inch.<p>By the way, Li Keqiang (#2 in China leadership) is a fantastic scientist, wonderfully inquisitive&#x2F;open-minded about knowledge, and is encyclopedic.  Great guy.