They are crouching forward

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Or southern Han

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Anyway, back to the Yantze, a century after the elimination of the Gokturk Khanate.
So, following the An-Lu-shan revolt,
jiedushi military governors became effectively independent. Again weakened by Huang Ch'ao's revolt in 875, the T'ang dissolved and in 907 were replaced by the "Five Dynasties" (and ten kingdoms) that successively ruled North China:
Later Liang (907–923) who overthrew the Tang. Three sinicized Satuo Turk dynasties: Later Tang (923–937), Later Jìn (936–947) and Later Han (947-951). Their Northern Han remnant held out until 979 when Song dynasty conquered it, reclaiming all of the former Tang territory.
The Later Zhou was the last of the five dynasties ruling from 951 to 960 when Zhao Kuangyin usurped the throne and founded his Song Dynasty, going on to reunite most of China by 979. Cavalry declined as the T'ang lost the horse-breeding areas of the northern frontier, and became dependent on tribal allied cavalry - first Uighurs, then Shatuo Turks.
Otherwise, weapons and equipment changed little.
Back since the Northern and Southern dynasties period, a style of armour called "cord and plaque" had become popular. Usually you will find much more ornate examples, with all sorts of embelishments. The elusive mountain armor of the Tang is quite enigmatic. Only the Southern T'ang (in the South 937 AD - 975 AD) fielded two-handed swordsmen guards.