> The ultimate goal is to have 45,000km of high-speed track. Zhao Jian of Beijing Jiaotong University, who has long criticised the high-speed push, reckons that

> The ultimate goal is to have 45,000km of high-speed track. Zhao Jian of Beijing Jiaotong University, who has long criticised the high-speed push, reckons that only 5,000km of this will be in areas with enough people to justify the cost. Do you agree with this 5,000km figure? If not, what figure would you choose?