Correct

虚实

/ xūshí / 
Strokes

Definition

what is true and what is false/(to get to know) the real situation

Example

As a Noun

truth and falsehood—actual situation

1
Xūshí
虚实
jiéhé
结合

combination of virtuality and reality

2
Tàntīng
探听
xūshí
虚实

try to find out about (an opponent); try to ascertain the strength (of one's opponent)

3
Biànbié
辨别
xūshí
虚实

distinguish fact from fable