China's trade with North Korea rose by 22% year-on-year in January and February, according to customs data. The increase comes ahead of the resumption of bilateral transportation links in March. Two-way trade values between the two nations rose to $418.7 million in the same period. China's exports to North Korea increased by 19% to $329.5 million, with the top export category remaining human hair. Wigs and hair products continued to dominate import shipments, totalling $30.26 million, down 9% from the previous year. The bilateral trade has helped shore up China's sanctions-hit economy, despite North Korea's deepening relationship with Russia raising concerns about its relationship with Beijing.