This time Gao Yang was greedy, but his greed brought him a rich reward, not referring to those guns, but the U disk he acquired.
The contents of the U disk were just a fleeting glimpse; it's still unknown what explosive information is inside. However, from just a few words, Gao Yang knew that what Poloneshenko talked about was related to Grand Ivan, and now, everything in Kiev is controlled by him and related to him.
The operation was prematurely exposed, which is a bit troublesome, so just stealing that U disk isn't enough; it also has to be taken away.
However, looking at the current situation, there shouldn't be any major problems, because Poloneshenko is already the new president, but he hasn't officially taken office yet, which makes a difference.