walking distance

Hi, I will travel to Guangzhou east station by subway.

Can you please advise me whether I can:
1) Return Yan Cheng Tong card exit J & H
2) Buy tickets to Shenzhen exit E, I & G
Is the walking distance far between the exits J/H and E/I/G?

I will be carrying quite few large luggages with me. Please advise.

If it is far, would you kindly recommend me where I should return the YCT card as I will be staying at 2nd Workers' Cultural Place. Thank you very much :)