China's Han Cong (front) and Sui Wenjing perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019. (Photos: Xinhua)

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Han Cong (R) and Sui Wenjing perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (L) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Han Cong (L) and Sui Wenjing perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (L) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (L) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (R) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (top) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (front) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (top) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

Evgenia Tarasova (front) and Vladimir Morozov of Russia perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (L) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (2nd L) / Han Cong (2nd R) and Zhao Hongbo (1st L), head coach of the Chinese figure skating team react after the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (L) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (C) / Han Cong (R) and Zhao Hongbo, head coach of the Chinese figure skating team react after the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Han Cong (R) and Sui Wenjing perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (L) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (2nd L) / Han Cong (2nd R) and Zhao Hongbo (1st L), head coach of the Chinese figure skating team react after the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (C) / Han Cong (R) and Zhao Hongbo, head coach of the Chinese figure skating team react after the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (top) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Han Cong (R) and Sui Wenjing react after the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (R) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.

China's Sui Wenjing (L) and Han Cong perform during the pairs' short program competition of 2019 ISU World Figure Skating Championships at Saitama Super Arena in Saitama, Japan, on March 20, 2019.