Here is some info on how to possibly remove without a hard reset....
Dianxin is usually found if a custom ROM was done on the phone. Have you changed your OS at all or rooted the phone? This can lead to issues. For more info about it you can go here... http
/www.xda-developers.com/dianxin-os-a-unique-android-based-chinese-os/
And the Baidu well it is, from all I can find, spyware. Obviously not something you want on the phone. This one, the only way I know to actually remove it is to do the "Hard Reset".
Should you choose to take that option and do a "Hard Reset", the instructions are as follows...
NOTE: A "Hard Reset" will erase date on the device, all data — like your apps, photos, and music — will be wiped from the device. Anything stored in your "Google Account" will be restored when you sign in, but all apps and their data will be deleted and cannot be restored. I would really suggest backing up all data before doing this.
To "Hard Reset" the phone...
1. Make sure that the phone is actually powered off.
2. Press the "Power" and the "Volume Up" buttons, together, until you see the start-up logo on the screen.
3. Once you can see the logo, release the buttons and allow the device to enter the "System Recovery Mode".
4. Next use "Volume Down" button to get to the "wipe data/factory reset" option When in recovery mode the "Volume Up" and "Volume Down" buttons are how to can navigate and highlight what option you need.
5. Once you have selected the "wipe data/factory reset", press the "Power" button to select that option.
6. On the following screen, repeatedly press the "Volume Down" button until the "Yes - delete all user data" option is what is selected.
7. Then press the "Power" button to hard reset the phone.