Nokia introduced the 801T for China Mobile (running – yes –  Symbian). These are roughly in the same price range and for consumers  have a similar number (801 vs 800) but the 801 is ‘one better’ and runs  on the network that is far bigger.” [1]
Tomi Ahonen, May 23, 2012

Honest!  China Mobile looked at the early specs of the Lumia 800, refused it,  and said put these same specs to a Symbian device, and don’t leave out  the good stuff we get standard nowadays on Symbian either.. Look at the  Nokia 801T and compare to 800 Lumia. China mobile essentially forced  Nokia to go back and reverse engineer the Lumia to take Windows out and  put Symbian in.” [2]
Tomi Ahonen, July 06, 2012

ExNokian comment: I still like the fact he used “honest” there.

Like  China Mobile said, when they saw the Lumia 800. They said, yes, I will  take that smartphone, but remove Windows from it, and put in Symbian –  and then also remove all the Lumia nonsense and make it a normal Nokia  device.” [3]
Tomi Ahonen, July 20, 2012

No wonder this  series has failed utterly in its launch and many carriers refused to  take any Lumia at all, like Verizon and China Mobile.” [4]
Tomi Ahonen,  August 15, 2012

Esimerkiksi maailman suurin  matkapuhelinoperaattorijatti China Mobile niin kiivastui Nokiaan, etta  ei suostunut ottamaan yhtaan Lumia mallia” [5]

( Previous in English: )
E.g.  World’s largest mobile operator China Mobile was so upset with Nokia  that they refused to take a single Lumia model
Tomi Ahonen, August 22,  2012

Now a step back in time:

China Mobile uses TD-SCDMA for their 3G network. Largest mobile operator in the world. Their only choice of technology. Only operator using the technology.
Now if you take ordinary 3G GSM phone like… Lumia 800 and fire it up in China Mobile network, it connects to 2G GSM network (as it lacks TD-SCDMA chip). So 2G is all you get. About 1/3 of the speed of 3G network. Tops.
Going “Lumia only” to such a setup is a suicide and I can’t blame Nokia for not doing that. And why would they, since specifically tailored Symbian phones for the network exist already? And again, why would they go for Lumia since TD-SCDMA is not the easiest standard to fulfill to a new OS.” [6]
And what comes to Tomi’s text, I think Nokia has done all the right things here: Making a TD-SCDMA version of WP7.x Lumias would have taken too much time and resources. I’d bet my money on Nokia entering TD-SCDMA with WP8 enabled Lumia.” [6]
Anonymous Ex-Nokian, July 29, 2012

…and to date:

Nokia Lumia 920 TD-SCDMA version will be launching on China Mobile, China’s largest carrier with more than 680 million subscribers, close to 70% of the country’s subscribers.
The support is made possible by the Qualcomm MSM8690/8260A chip which does support China Mobile’s TD-SCDMA standard.
China Mobile has still not decided to offer the iPhone, including the iPhone 5

Not wanting to be left out, Sun Yi, an executive from China Telecom, with more than 200 million mobile phone subscribers, said while they will not be getting the Nokia Lumia 920 they will in fact be releasing Windows Phone 8 handsets from other OEMs such as HTC and Samsung.” [7]
News article, source: director of Nokia China (September 13, 2012)

Told you so.

Anonymous Ex-Nokian, September 15, 2012 (this blog post)

EDIT 23-Oct-2012:

Story continues:

Tomi Ahonen, September 21,  2012

“Rumor and wishful thinking”, you say? Tomi – I told you so:

On their Weibo channel China Mobile, the largest carrier in the world, has now officially announced they will be offering the Nokia Lumia 920T.
The handset supports both China Mobile’s version of 3G (TD-SCDMA) and LTE (TD-LTE).
The handset will cost 4888 yuan and 5888 yuan depending on the version and will be available in November.” [8]
News article, October 23, 2012

(ExNokian comment: I have been informed that Lumia 920T actually does not support TD-LTE. Mistake also in original article.)

Tomi – listen to me:

Anonymous Ex-Nokian, October 23, 2012 (this blog post)

EDIT: (October 29, 2012)

He’s really persistent:

But meanwhile in China:

Sharp-eyed folks just spotted a new entry for Nokia Lumia 920T acquiring China Compulsory Certification (CCC). As to what is CCC, just imagine it as a Chinese version of FCC. This is a major milestone before a new gadget hits the country’s legal market.” [9]
WP Central, data from China Quality Certification Centre, November 1, 2012

Tomi: Read my lips:

I get it – Tomi feels Weibo is inferior to Twitter and China Mobile should switch to Twitter as Weibo is just rumor channel. (That was sarcasm) But as icing on the cake:

Deutsche Bank analysts said its recent meeting with China Mobile’s management left them with the impression that there was little momentum for an agreement because of the “heavy subsidy burden” required to bundle the smartphone as part of its service offerings — an issue irksome to the Chinese government, which controls the company.
“We believe that the stars are not aligned for a China Mobile licensing of the iPhone 5,” Deutsche Bank analysts said in a note. “The government is not supportive.”
” [10]

Coupled with:

China’s State Radio Management has approved two versions of the iPhone 5 for use on the country’s wireless networks. The first — the A1429 — is believed to be compatible with China Unicom’s 3G network; the second — the A1442 — is compatible with China Telecom’s CDMA network.” [11]

So… No iPhone for China Mobile? That means Apple lost its chances to sell iPhone for 66% of Chinese mobile subscribers. Probably not a big deal.
(Note: There is no way this could be anything else as Tomi has already told us so many times that Lumia line not being sold by China Mobile has nothing to do with technology constraints. Why would it be any different for Apple?)

UPDATE 05-Dec-2012:

Now also official announcement: