Info 2 [Q] How to enable Google now in China, please!

Hi there,

I am from China and before getting my nexus 5 I owned a galaxy nexus, in which Google now works well just when phone is switched into En-US.

Now for nexus 5 this does not work.
someone uses a AT&T SIM card to enable google now.
some turns the phone into airplane model, turns off location and connects to VPN network to enable it.
Some says "Ok Google" then follow the instructions to enable it.

It seems that all these does not work for me, is there a easy way to enable Google now.

Regards

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following this post, then it works.
Non-native, trying to be understood.