It depend on your region also,but you can check if it is activated.You are not the first one who asked this, http://answers.ea.com/t5/Battlefield-4/China-Rising-DLC/m-p/1940649#M60961
How to check For DLC
1)Right click BF4 on your Origin client and choose "show game details".
2)Scroll down to expansion. If China Rising was activated it should not be greyed out.
3)If it is I suggest you contact a game advisor to check your account.
For any issues regarding accounts/refunds, please follow these steps to contact a game advisor for more help:
1. Click the link https://help.ea.com/en/contact-us/ask and log in with your Origin name and password.
2. Where it says: ’What Can We Help you With’, type in ‘GAME NAME’
3. Click Find Solutions
4. Select "Your problem,eg accounts" from the drop-down list and also select your platform from the list.
5. Click: Find Solutions
6. Scroll down a little and on the lower right hand side, Click "I Still need Help"
Picture to help you understand better, https://help.ea.com/article/welcome-to-the-new-and-improved-ea-help-center
The Window Will Open...
You’ll now see the currently available contact options(Depending on your game). These may vary depending on your geographical location and the time of day. Phone or Live Chat are the best options.
For customers in North America:
- Select "Call me."
- Enter your phone number.
- Select "Submit."
For Customers outside of North America:
- Go to the "choose a contact method" section
- Contact us using the telephone number provided within the listed opening hours
Please be aware that it is likely that the agent you speak to will need to confirm your personal informations on this account.
Hope this helps
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***Please note...I do not work for EA/Origin. Questions belong in the forums,Solution is like medicine,same medicine/solution may not work on same problem.I'm helping you because I'm also a victim of EA for releasing their half baked products to us,gamers.
I don't answer questions via PM. AHQ is "Player-to-Player" technical self-help forum