Guns are very seriously restricted in China, yet a mass killer armed with a simple knife killed eight, and wounded five. China has a problem with mass killings with knives. The article points out there was a rash of these in 2010 with 20 killed and 50 wounded.
Where there is a will, there is a way. We keep being told by our presumptuous betters how ridiculous we are with that statement, but experience seems to bear it.