I have used the original Jinke firmwares as well as the lBook and BeBook firmwares on my (lBook-branded) V3 without problems. The Chinese language support (if that is what you're inquiring about) should be roughly equal on all of them, except that the UI in the lBook firmwares is Russian (or Ukrainian?) by default, while it's English in the BeBook firmwares. You should be able to switch to Chinese from the settings menu (press Menu-button, then 6 in the bookshelf).
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