Language: Mandarin Chinese
Source: Classical literature

The Green Standard Army Long Spear or lùyíng chángqiāng (綠營長槍) in Chinese was a large spear issued to the troops of the Green Standard Army in the Qing dynasty.

The lùyíng (綠營) or  Green Standard Army was an all-Han Chinese army that was scattered across the empire, mostly in small garrisons. They mostly served as internal peacekeepers but would also back up the elite Eight Banners in larger conflicts.

No antique examples of the lùyíng chángqiāng seem to have survived, but the spear is described in the Huangchao Liqi Tushi (皇朝禮器圖式) of 1766:¹

"According to the regulations of the dynasty; Green Standard Army Long Spear:
Spearhead made of forged steel.
Overall 1 zhang 4 chi long.
Spearhead is 7 cun long.
Shaft is 1 zhang 3 chi long with a circumference of 3 cun 7 fen.
Made of wood, lacquered vermillion.
It has a red yak hair tassel.
Steel fitting at end is 3 cun long."

Converted to cm
Overall: 490 cm
Head: 24,5 cm
Shaft: 455 cm
End fitting: 10,5 cm

Spears of the Qing dynasty.
#4 is the Lùyíng Chángqiāng or "Green Standard Army Long Spear".
The figure is 175 cm tall.
Click to enlarge

Also see:

Article: Spears of the Qing dynasty

Notes
1. Huangchao Liqi Tushi (皇朝禮器圖式) of or "Illustrated Regulations on the Ceremonial Paraphernalia of the Dynasty". An illustrated work commissioned by the Qianlong emperor in 1750, the first manuscript was finished in 1759 and the first woodblock-printed edition was completed in 1766.
2. Based on a 1 chi equals 35 cm conversion.