As promised, the China jailbreak team had just released the stable version of jailbreak for iOS 8 - 8.1. This jailbreak already bundle with Cydia so you don't need to install Cydia manually. If you wish to jailbreak your iOS 8, you can do it now. However, please remember to update the untethered package to 0.3 in Cydia.
Please follow the step below to perform jailbreak.
Step 1: Download latest version of Pangu (v1.1) from the Pangu website (en.pangu.io) and save it to the desktop.
Step 2: Ensure the latest version of iTunes (v12.0.1) is installed on your iDevice and it is recognised in iTunes.
Step 3: Right-click on Pangu app and choose Run as Administrator, and then click Yes to confirm.
Step 4: Allow Pangu to identify your device and then uncheck the box to prevent bloatware from being installed. Please remove your passcode before clikc the jailbreak button. Finally, click the blue jailbreak button.
Step 5: Wait for Pangu to complete the jailbreak process or until the blue status bar gets filled up to 100%.
Step 6: Launch Cydia and let it run the setup or configure itself. Finally, install the necessary updates when prompted.