HSK 5 HSK C2/W2/V2
Correct

亿

/ yì / 
Strokes

Definition

100 million

Example

As a Measure word

a hundred million

1
Zhōngguó
中国
yǒu
有
13yì
13亿
duō
多
rénkǒu
人口
  
。

China has a population of more than 1.3 billion.