A visitor poses for a photo with an interactive design 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)

Visitors view oil paintings 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)

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)

A visitor takes a picture of an oil painting 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)

Visitors view oil paintings 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)

Visitors view oil paintings 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)

A visitor views oil paintings 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)

Visitors view artworks 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)

A visitor takes a picture of an oil painting 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)

Visitors view an oil painting 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)

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)