Found some info about this:
Spoiler
"This vehicle is a wheeled self-propelled anti-aircraft gun, the existence of which was revealed by China New Era Technology Co Ltd at the IDEX 2007 arms fair in the United Arab Emirates.
The new wheeled vehicle body was developed on the basis of the Type 90/92 wheeled armoured vehicle (WZ-551/WZ-551A), hence the name ‘WZ series wheeled bottom plate’. 60% of components are common to the WZ-551, but this is to reduce the risk of new development and utilise existing maintenance infrastructure for the WZ-551 The purpose is said to be to reduce the risk of new development and to make use of the existing maintenance infrastructure for the WZ-551. The engine, drive and manoeuvring parts are modular and can be combined according to specifications to produce a vehicle suitable for a variety of missions.
The vehicle structure consists of the pilot’s and captain’s seats and gearbox at the front, the power unit in the centre and the armament space at the rear. The vehicle height is relatively high because the power transmission mechanism is located at the bottom centre of the vehicle body. The large compartment at the rear of the vehicle body can be used to mount various types of armaments. In addition, a large hatch is provided at the rear of the vehicle body for boarding and disembarking, allowing ammunition and supplies to be loaded quickly and safely. The vehicle’s height can be varied freely by means of a centralised pneumatic control system, making it suitable for rail and air transport. The front and sides of the vehicle are made of 15 mm and 8 mm rolled bulletproof steel, respectively, and the front can defend against 25 mm armour-piercing bullets fired from 1000 m, while the sides can defend against 7.62 mm armour-piercing bullets fired from 100 m. All tyres are bulletproof. All tyres are bulletproof.
In addition to the 30 mm anti-aircraft self-propelled artillery gun, there are also 100 mm wheeled self-propelled anti-tank gun, 105 mm wheeled self-propelled anti-tank gun and 122 mm self-propelled howitzer as derivatives of the ‘WZ series wheeled baseplate’, which can be equipped with various anti-tank missiles and anti-aircraft missiles. When used as an armoured personnel carrier, it can carry 14 fully armed soldiers.
The main armament of the vehicle is a series of 30 mm machine guns mounted on both sides of the turret; the 30 mm machine guns have an initial muzzle velocity of 970 m/sec, an effective firing height of 3,000 m and an effective range of 100-4,000 m. The total rate of fire of the four guns is 3,900-5,000 rounds/min. However, due to the heating of the barrel and the number of rounds carried, it is thought that in practice the main focus will be on shorter bursts of fire. The turret can be turned all the way around and the gun has an elevation angle of -2° to 87°. The scatter field of the shells is 2mil x 2mil; the target kill rate with HE rounds is 60%.
A tracking radar is installed in the front of the turret and a search radar in the rear of the turret, enabling simultaneous search and tracking of targets. An electro-optical sight is also mounted on the top of the turret, but details are unknown. Continuous operational time is eight hours.
It is unclear whether this vehicle was developed for the Chinese military or for export. At present, there is no information that this self-propelled anti-aircraft gun has been deployed by the Chinese Army."
(From: https://seesaawiki.jp/w/namacha2/d/30mm���ؼ�������ˤ��WZ�����������ü���������#pagetop
