A staff member introduces oil paintings to visitors during an international oil painting exhibition held in Harbin, capital of northeast China's Heilongjiang Province, June 16, 2019. The exhibition, as an important cultural event of the ongoing Sixth China-Russia Expo, kicked off here on Saturday. More than 1,000 pieces of artworks, including oil paintings and sculptures, are on display during the five-day event. (Xinhua/Wang Jianwei)