The FriedrichFiles - My questions on Chinese vessels and aircraft

Who can answer these questions?

- Tuzhong-class (tugs, around 1975) date of entry into service
T 154 or T 164, T 710, T 830, T 890 ?
displacement: 2300 ts
dimensions: 76,2 or 84,9x 14x 5,5 m
armament: 4x 3,7 (twin mounts)
speed: 18,5 kts

- Yunnan or Yunan class type 067 (landing craft) date of entry into service
armament: 2 MG
load: 1 tank
displacement: 300 ts
dimensions: 29x 5,2x 1,1 m
speed: 10,5 kts
number built: aprox. 300
date built: around 1968-72

I seek photos, designation, year of first delivery, equipment and purpose of each version of the Harbin Z-9.

Can you identify this or this version of the XAC Yun-7?
The first is not the Yun-7-100, 100A, 100C, 200B, Y-7H-500, so maybe it is the Yun-7-200A?
It could be a Yun-7 as retro fitted with winglets, a Yun-7-100 as retro fitted with winglets, a Yun-7-100A as (retro?) fitted with winglets, a Yun-7-200A as (retro?) fitted with winglets or a Yun-7-200B as (retro?) fitted with winglets.
Most likely would be the Yun-7-200A, does somebody have a picture of her?
The second is definitely not the Yun-7-100A.
Xian Yun-7: when was this version retro-fitted with winglets? who can send a photo of it?
Xian Yun-7-100: when was this version retro-fitted with winglets? who can send a photo of it?
Xian Yun-7-100A: date of first delivery? when was this version retro-fitted with winglets? who can send a photo of it?
Xian Yun-7-200A: when was this version retro-fitted with winglets or did it carry them from the beginning? who can send a photo of it?
Xian Yun-7-200B: when was this version retro-fitted with winglets or did it carry them from the beginning?

Harbin Y-12: Which version is shown here, and when did it enter into service/was first delivered?

Cheng Du Aircraft Industrial Group Co Ltd Chengdu FC-1 Xiaolong: date of first delivery

Answers for me ?

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