Today morning when I woke up I found to e-mails from Apple that says:
Your Apple ID, was just used to make a purchase in 神仙道海外版 from the App Store on a computer or device that had not previously been associated with that Apple ID.
When I went to change my password, I found out that almost all of my store credit has gone and I found a chinese game on my iPhone that I didn’t purchased (the one you see above). I e-mailed Apple Customer Support, and they will be in touch with me again as soon as they have further information for me.
To avoid this happing to you, change your password with much difficult one ASAP.