HSK V7-9
Correct

前沿

/ qiányán / 
Strokes

Definition

front-line/forward position/outpost/extending ahead/frontier (of science, technology etc)

Example

As a Noun

forward position

1
Qiányán
前沿
zhǐhuībù
指挥部

forward command post

2
Qiányán
前沿
zhèndì
阵地

forward position

3
Qiányán
前沿
bùduì
部队

front-line troops

As a Noun

frontier (in scientific research, etc)

4
Zài
在
gǎigé
改革
de
的
qiányán
前沿

in the forefront of the reform

5
Wùlǐxué
物理学
qiányán
前沿

frontier of physics