Several of Kong's predecessors met Japanese leaders to bid farewell. Still, the sources said Kishida broke the custom amid worsening public sentiment amid Chinese vessels' repeated entry into waters near the Tokyo-controlled Senkaku Islands and the past flights of suspected Chinese spy balloons over Japan. The request for an in-person farewell by Kong, succeeded by former Chinese Assistant Foreign Minister Wu Jianghao in March, was made to the Japanese government around January. Still, they said Tokyo declined, citing a "schedule conflict" for Kishida.