Flying in an executive jet used to be the preserve of millionaires with their own aircraft, tycoons who ran their own businesses or company bosses prepared to justify the use of corporate aircraft to sceptical shareholders.

• 乘坐商务机旅行曾是富翁们的专利，不管是自营的工商业巨头还是受雇的公司经理人，现在都准备向多有微词的股东们证明，他们并非败家子弟。