HTC Global site official reply...
QUOTE
Thank you for contacting HTC.
We are very sorry for the inconvenience. Since your handset is shipping to China. As you know, for some business reason Google do not serve for China any more. Then Chinese Government won’t allow Google apps installed in the handset. In the Android system, HTC won’t install the Google play store for the device which is shipping to China. Because all the software in the HTC handset need to be verified by Ministry of Industry and Information Technology of the People's Republic of China. So we are very sorry to say that we can’t help you to install the Google Play. If you want to download some apps which you can’t found in HTC marketplace , may be you can try to search on the other website. Should you require further assistance, please do not hesitate to contact us again. We look forward to be of service to you again.
Have a nice day!
UNQUOTE
BTW, I have 3 other HTC Sensation (with Chinese SIM/Nos), One X and One X+ (bought in Malaysia) and the Google Play Store work fine here except that I just can't connect the Facebook, YouTube and those banned in China. When returning to Malaysia they are normalise. This crap about Chinese Ministry is b/s and that would just encourage foreigners bringing their own phones or buy foreign phones from gery market, that's help the economy....