most china bikes come assembled with little to no lubrication. Cables included. Before I would even consider riding a new china bike I would take the clutch and throttle cable off and lube them as part of the assembly process.
Grab your self a cable oiler / wire roober from the bike shop , their around $12.95 and made by DRC. Preety trick things allow your cable to slot in one side and pull the wire so you can spray the exposed wire cable inside. I do this with my clutch cable every 4 rides and it feel almost like a hydro clutch.
Also you can manually adjust your clutch action via the barrel on the lever perch and the barrel near the clutch arm. Try this too , a bit of toying with these and you'll have your clutch working perfect!