I think you ask the saving account. For Hong Kong people in ShenZhen area I suggest to use 建設銀行 since they have many branches and you can use ATM machine to draw money same as bank in Hong Kong. The interest rate is higher than Hong Kong and you need to present you HK I.D. Card and fill the application form.
Other suggestion is 招商銀行 and 中國銀行 becasue they are biggest banks in China. But they do not have so many branches compare with 建設銀行.
Current I using the 招商銀行 since it is close to my ShenZhen Office.