Russia's Gazprom Neft has sold its first ever Arctic oil cargo to China to ChemChina, two sources familiar with the deal told Reuters on Thursday.This week, Gazprom Neft said it had sent 144,000 tonnes of light Novy Port oil grade to the Chinese port of Yantai on the Bohai Sea from Russia's north-western city of Murmansk, using the Northern Sea Route (NSR) through Russia's Arctic waters.The Delta Hellas vessel used part of the NSR, a route requiring icebreakers and ice-class tankers, Refinitiv Eikon data showed, sailing west from Murmansk to reach Suez and then China.Gazprom Neft said this week the delivery took 47 days, without providing the buyer's name.Gazprom Neft and ChemChina did not reply to Reuters requests for a comment.The company regularly supplies ESPO Blend crude oil to China