Well, that was intricate. Don’t think I’ve needed that much time to paint a single figure before. At least it’s done now. I’m glad Infinity is a skirmish war game, because I would not want to assemble and paint another. That said, the effect is awesome. What a cool robot. It was a simple model in terms of painting, there’s only really 4 kinds of surfaces aside from the base. Armour, light structure, dark structure and lights. I painted them all the same as his mobility form to try and pass them off as the same trooper. Access was the real pain, it’s not a good idea to invert this thing to get at hard to reach places. I learned that the hard way. Either paint it in pieces deliberately, or you will be painting it in pieces by accident.
Now, onto the name. The unit description on the old website, which is the same as in the Human Sphere book, says Sù-Jiàn means swift sword (I’ll paste the whole bio after because it is cool). From that we can work out the characters are “速剑”.
The first character, 速/Sù, can function as a noun for speed itself, or can be used as an adjective, as is the case in this unit’s name. To pronounce it, take the word “tool”, take away the ‘l’, then turn the ‘t’ into an ‘s’. You should be bang on the money.
The second character, 剑/Jiàn, usually denotes a specific kind of sword, that being the iconic Chinese double-edged straight sword, which is often used in Wushu and Taiji. It’s pronounced as a single syllable not unlike “j’yen’. You can see that is is spelled similar to and rhymes with 天/Tiān，the character that features heavily in the Celestial Guards. As a recent creation, pinyin is internally very consistent, which is good news for anyone trying to learn.The tones are a little different but I am not going to try and convey tones over the internet, seeing as I struggle in real conversation.
On to the unit description…
The Sù-Jiàn Program, “The Swift Sword”, is the weapons system of the future. It goes beyond tactical exoskeletons and other concepts of modern war. It is a sure bet for progress. A jump into the future. The first step towards a war machine being a true extension of man’s will. The sublimation of the virtual warrior […]
[…] The Sù-Jiàn Program is the jewel in the crown of Yu Jing’s military industry. A Remote Presence Heavy Infantry with variable morphology. The key to its success is the integration of Remote Presence technology, the supposedly PanOceanian great achievement, into Yu Jing’s military specialty: its famous Heavy Infantry armor. Usually, servo-powered armors are slow and heavy, while what was sought was the opposite, nimbleness and mobility. To that end, instead of creating and developing hardware improvements, it was decided to remove the human operator.
After the achievements in terms of hardware from the Karakuri Project, it was necessary to go beyond them and create a precise interface able to reflect quickly and exactly the movements and intentions of its remote operator. The pilot had to become his own armor. For this purpose, it was vital that the remote interface allowed a direct connection with its operator. New neural connections had to be created that would work within the reduced space of a human sized exoskeleton.
Through the interface, a pilot feels the sensation of the exoskeleton getting ready for action. The energy concentrates in the limbs’ accumulators, while the entire system focuses on responding to new challenges, acquiring superhuman strength and agility. The interface also has an onboard tactical assistant, a computer built into the exoskeleton’s connection and control devices. This assistant remains constantly active, processing every situation and predicting future events; tracing trajectories, anticipating an enemy’s movements, guessing the pilot’s intentions and improving them. 
The Sù-Jiàn’s variable morphology allows it to exploit both the incredible speed and movement capabilities of its High Mobility shape and the more lethal and precise qualities of its Combat form. In the Sù-Jiàn’s body design the peculiarities of urban combat have been taken into account. The geometry and perspectives of urban fights are very different from those in open fields, as it is much more vertically-oriented. This is why the designers were especially anxious that the Sù-Jiàn would have incredible speed and agility, even on vertical surfaces. The result of this aggressive R&D effort is a unit capable of going where a TAG can’t, thanks to its smaller size, weight and impact on terrain. It is a very quick, agile and mobile unit, equipped with considerable firepower and good armor. All of this adds to the aggressive tactics of its remote operators, creating a highly effective troop in all aspects. 
“Yes, effectiveness is great, but the best part of piloting a Sù-Jiàn is activating the boosters and running at top speed through the battlefield, or defying gravity and climbing like a spider up the side of a building to shoot a pair of antitank projectiles at the enemy from where he least expects it!” 
“Variable morphology means you can choose between two operative modes: Combat or Mobility. In other words: Kick Ass or Full Throttle.” 
- Fragment of “Jì Shù Jīn Rì” (Technology Today) Educational broadcast from the Information Ministry, StateEmpire of Yu Jing.
- Fragment of “The Future of War” Broadcast no. 93. Program from the military entertaiment channel Sabot! Only in Maya.
- Sergeant Yin Wenbo, Sù-Jiàn Unit. Interview for Diàn Guāng (The Lightning) channel. Exclusive broadcast in the Yu Jing territories’ Maya net.
- Non-commissioned instructor officer Zheng Tāo. Sù Jiàn Unit. Special Training Centre of Cheng Tû, Prefecture of Zhî Tû, Yutang, Yu Jing.
Here’s how I imagine all that might look.
I had been day dreaming about that for a while now. Putting the two models side by side doesn’t really convey what the Sù-Jiàn is all about. Maybe my blurry montage can better convey the dynamic nature of the trooper presented by the unit description.