Usage of the character 针

a policy expressed as an eight-character slogan
(esp.) the eight-character slogan for the economic policy proposed by Li Fuchun 李富春 ( Lǐ Fuchùn) in 1961: 調整、鞏固、充實、提高／调整、巩固、充实、提高 "adjust, consolidate, enrich and improve"

yīzhēnjiànxiě

一针见血

[一針見血]

lit. to draw blood on the first prick (idiom)
fig. to hit the nail on the head

shuāngbǎifāngzhēn

双百方针

[雙百方針]

refers to 百花運動／百花运动 ( Bǎihuā Yùndòng) with its slogan 百花齊放，百家爭鳴／百花齐放，百家争鸣

chuānzhēnyǐnxiàn

穿针引线

[穿針引線]

lit. to thread a needle (idiom); fig. to act as a go-between

zhēnxiànbólí

针线箔篱

[針線箔籬]

wicker sewing basket (dialect)

zhēncìmázuì

针刺麻醉

[針刺麻醉]

acupuncture anesthesia

dìnghǎishénzhēn

定海神针

[定海神針]

another name for 金箍棒 (jīngūbàng)
(fig.) stabilizing force

èrbǎifāngzhēn

二百方针

[二百方針]

see 雙百方針／双百方针 (shuāngbǎifāngzhēn)

chuānzhēnzǒuxiàn

穿针走线

[穿針走線]

to thread a needle

zhēnfēngxiāngduì

针锋相对

[針鋒相對]

to oppose each other with equal harshness (idiom); tit for tat
measure for measure

zhēnyèzhíwù

针叶植物

[針葉植物]

needle-leaved plant (e.g. pine tree)

hǎidǐlāozhēn

海底捞针

[海底撈針]

see 大海撈針／大海捞针 (dàhǎilāozhēn)

zhēnwěilüjiū

针尾绿鸠

[針尾綠鳩]

(bird species of China) pin-tailed green pigeon (Treron apicauda)

dàzhèngfāngzhēn

大政方针

[大政方針]

major policy of the national government

miánlǐcángzhēn

绵里藏针

[綿裡藏針]

lit. a needle concealed in silk floss (idiom)
fig. ruthless character behind a gentle appearance
a wolf in sheep's clothing
an iron fist in a velvet glove

bízhēnliáofǎ

鼻针疗法

[鼻針療法]

nose-acupuncture therapy

zhēnwěishāzhuī

针尾沙锥

[針尾沙錐]

(bird species of China) pin-tailed snipe (Gallinago stenura)

jiànfèngchāzhēn

见缝插针

[見縫插針]

lit. to see a gap and stick in a needle (idiom); fig. to make use of every second and every inch

rúzuòzhēnzhān

如坐针毡

[如坐針氈]

lit. as if sitting on pins and needles (idiom)
fig. to be in an uncomfortable situation

tiěchǔchéngzhēn

铁杵成针

[鐵杵成針]

see 磨杵成針／磨杵成针 (móchǔchéngzhēn)

zhēnkǒngshèyǐngjī

针孔摄影机

[針孔攝影機]

pinhole camera (for espionage, voyeurism etc)

zhēnjiānduìmàimáng

针尖对麦芒

[針尖對麥芒]

sharply opposed to each other, with neither prepared to give an inch (idiom)

wúzhēnzhùshèqì

无针注射器

[無針注射器]

jet injector

báihóuzhēnwěiyǔyàn

白喉针尾雨燕

[白喉針尾雨燕]

(bird species of China) white-throated needletail (Hirundapus caudacutus)

huīhóuzhēnwěiyǔyàn

灰喉针尾雨燕

[灰喉針尾雨燕]

(bird species of China) silver-backed needletail (Hirundapus cochinchinensis)

zhēnjiānrduìmàimángr

针尖儿对麦芒儿

[針尖兒對麥芒兒]

see 針尖對麥芒／针尖对麦芒 (zhēnjiānduìmàimáng)

zhǐyàogōngfushēn,tiěchǔmóchéngzhēn

只要功夫深，铁杵磨成针

[只要功夫深，鐵杵磨成針]

If you work at it hard enough, you can grind an iron bar into a needle.
cf idiom 磨杵成針／磨杵成针, to grind an iron bar down to a fine needle (idiom); fig. to persevere in a difficult task
to study diligently