Correct

千千万万

/ qiān qiān wàn wàn /
Strokes

Definition

lit. by the thousands and tens of thousands (idiom); untold numbers/innumerable/thousands upon thousands

Example

Definition

thousands upon thousands; millions upon millions

1
Qiānqiānwànwàn
千千万万
de
rénrénzhìshì
仁人志士
wéi
xīn
zhōngguó
中国
de
jiàn
建立
xiàn
chū
le
自己
de
shēngmìng
生命
  

Millions upon millions of people laid down their lives for the founding of New China.

Definition

be sure to; must

2
shì
此事
qiānqiānwànwàn
千千万万
不可
diàoqīngxīn
掉以轻心
  

Under no circumstances should we take this lightly.

3
Qiānqiānwànwàn
千千万万
yào
xiǎoxīn
小心
  

Do be careful.