1 surname Wei

2 ancient Chinese state near present day Chongqing

3 Taiwan pr. [Wéi]

1 detective

2 to do detective work

1 lowly

2 humble

1 Weixin or WeChat (mobile text and voice messaging service developed by Tencent 騰訊|腾讯[Téng xùn])

1 microblogging

2 microblog

1 (idiom) what lowly people think counts for little

1 to be of humble origin (idiom)

1 to examine tiny clues to know general trends (idiom)

2 to deduce the whole story from small traces

1 to poke one's head in and pry (idiom); to spy

2 nosy

1 a tiny bit

2 very little

3 next to nothing (idiom)