long time to travel by green train. But now the high-speed train has made trips much more comfortable
and it takes less time to travel. People used to wait for the buses for a long time to go to work or school.
However, many people like to ride shared-bikes better now. It's good for the environment and people's
health. We had to do some shopping in the supermarket ten years ago, but shopping online has made
it possible for us to shop anywhere and at any time these years. What's more, we don't need to take
paper money with us when shopping. Most of us have been used to mobile payment.
