The chart gives us an overall picture of China's online travel booking market in the last
four years. The first thing we notice is that both the annual growth rates of consumers
and transaction value are decreasing. This means that as time goes by, the number of
consumers and the number of transaction value grow slower than before.We can also see fro
m the statistics given that the total numbers of consumers and transaction value are
increasing year by year, with 2018 the highest of the four years