Chinese database conversion from 5.0 to 2013R2

Hi All,

I am trying to convert Chinese database from 5.0 to 2013R2.
I have there a lot of chinese characters which are stored in the db in a different way than the standard characters.

As a first thing i checked how the data looks in the SQL Sever, this is quite big mess.
Data presented in SQL Server is completly different that in the Navision 5.0, some strange characters, but in the Navision 5.0 when I open table everything looks perfect.

Conversion task is done with these steps.
1. Technical conversion to 2009R2 (Chinese characters are still visible when I check in the Navision table, but in the SQL Server I can't see Chinese Characters)
2. Technical conversion to 2013 (I can't check how the data looks like in the Navision, but in the SQL Server is still mess)
3. Technical conversion to 2013R2 (after I imported all necessary objects I was able to connect db to the service and open table) As you can expect data presented in the RTC Navision table is not what I had in 5.0. Chinese characters were replaced with some strange digits, i can see the same "strange" characters like on SQL Server.

Is there any person here who has some expirence with this kind of conversion?
I am looking for some tips how to convert this db from 5.0 to 2013R2 and keep there Chinese characters.

Thanks in advance for your help.