First, read the English article below.

You can access this by sliding to the left on your Start screen and tapping the Settings button. Select “Lock + wallpaper”. Enter a password into the “New password” text box. Enter it again to confirm  it. Tap Done to save your password. Tap the “Change password” button in the “Lock + wallpaper” menu. Enter your old password, and then enter the new password twice in order to set it. To unlock your phone after setting a password, turn the screen on, flick the screen up so that you can enter your password, and press OK. Your phone will then unlock. If you forget your password, you will have to factory reset your phone in order to access it. Check your phone’s documentation for instructions for your specific device. Factory resetting will delete the data on your phone. 

Now, please write a short abstract for it in Chinese. Abstract:
打开设置。 打开密码选项。 改变密码。 解锁手机。