[locust101]

Calling it lowest ever means that you can get more yuans than ever in 11 years for 1 dollar. If you look at the chart, it clearly shows that this is the maximum yuan amount you can get for 1 USD in at least 5 years.

[sokoloff]

Right. In other words, "the value of 1 yuan is the lowest in 11 years in terms of how many dollars it can buy..."