I had a chance to travel around China during my more than four year stay. It is amazing how fast China develops. During my first trip to China about ten years ago, China cities like Beijing were congested with so many bicycles, even vehicles need to find their ways through a throng of bicycles. But when I arrived there for my second visit and stay, the roads were full cars and the bicycle lanes were not as busy as before. Now, the road can have 3 or 4 lanes one ways but it is still full with vehicles and heavy traffic is common.

What does it show from the above one scenario?