According to the link Lutfij posted, it would appear all of the CPUs should work interchangeably, without the need to update a BIOS, due to them having similar specs and being released at similar times. In addition to this, Chinese motherboards from previous generations typically already have the required BIOS needed to run all CPUs of their socket (and in cases of LGA 775 desktop motherboards, also have the ability to run modded 771 CPUs out of the box).
When the motherboard arrives (or if it has already) test it with the included CPU. This will make sure it works alright. Also look out for any BIOS version numbers you can find while POSTing or within the BIOS. Then, when the new CPU arrives, pop that in, and if it works then you are good to go.
If it doesn't then look for updated BIOSes. All you have to do is Google your motherboard's model number followed by BIOS update. Then, compare the versions that come up with that of your BIOS, and get the newest one. To update the BIOS, you will need to follow the instructions, and use the original, working CPU.