Prescription medication

Hello,
I take blood thinners in 0.8ml injections twice daily. I will have the medication on my carry on and I will be in China for 12 days. I will be travelling by air and train so I will be going through security check points. Should I have a note translated in Mandarin and Cantonese explaining what the injections are? Although they are individually wrapped would there be any issues since they are in injection form?