Step 1: go to link http://www.apple.com.cn/itunes/ to download iTunes software.
Step 2: open iTunes Store after opening iTunes
Step 3: after entering App Store, tap in keyword “Sunlogin control” in search field, click to enter Sunlogin detailed information page.
Step 4: click on free to download Sunlogin and a pop-up will appear for entering account or create new account, select “create Apple ID”
Step 5: select the terms and conditions following the prompts and enter the page to create new account
Step 6: in the new page tap in account ID and other related information, then click on “continue” to enter “provide payment method” window. However, there is no need to neither select credit card nor provide any credit card information because the download is free.
step 7: iTunes will send a confirmation email to the email adress you provided, check your email and finish the account registration by following the link in the email.
step 8: return to the Sunlogin long-range control page previously opened, click on "download" to finish purchase. iTunes will download the app automatically.