Here is the updated version of Baiduyun Rom which has always been developed by BaiduYun Rom team.I am sure it's old version has been posted in needrom here.
It was officially posted on 2014.05.24 and I am just moving links!
introduce：
Baiduyun rom is famous for its speed and light weight.It offers all secure parts and it's developers say you even don't need any other app for security.
No google play and only CN/EN supported.
Original forum
[url]http://bbs.rom.baidu.com/forum.php?mod=viewthread&tid=138468&mobile=no[/url]
updated:
1.We have 1000 icons repainted and 500 interfaces processed.It's now a new UI.
2.We collect all secure functions in one secure centre to make them easy to find.
3.Customize your own boot animation by cut movies or add other animations by yourself now.
4.3D effect in lockscreen interface.
5.Decline new calls just by slide up by your finger.
6.Stop the front app by long press back button.
7.More to be found!
Its battery should be used slowly but in A820 it's not.The power drops a little fast and their reason is that it's developers don't have the source code of lenovo a820's kenel.After many efforts they failed to solve it perfectly.But apparently they have been reducing the battery use.Hope the battery use in v6 is acceptable.for you.
Afer so many updates v6 has improved a lot in many ways.It is formal and more stable.You can have a try.