Yabla Chinese

Yabla video uses of 侦查
并且 bìngqiě
是 shì
通过 tōngguò
一种 yīzhǒng
难以 nányǐ
被 bèi
侦查 zhēnchá
到 dào
的 de
这种... zhèzhǒng...
And also, it's occurring by means of a difficult to detect, kind of...
凭 píng
着 zhe
长期 chángqī
的 de
侦查 zhēnchá
经验 jīngyàn
Drawing on his years of investigative experience,