Dear people instructions the price of Lao Fengxiang PT950 diamond ring

I bought a diamond ring of Lao Fengxiang today, with a total quality of 2.2922g, round diamond shape, color F-G, clarity VS, cost 4640 yuan, PT950 ring, weighing 2.26, diamond: 0.151ct, please give pointers, there are, there are, there are any Not buying expensive!