sentences:  Although not as fast as more modern fighters, after 1942, the aircraft was still fast enough to enable it to often avoid interception unless it ran into a standing patrol of fighters.The 90th Air Regiment of the 5th Air Army (based in Hopei, north China) equipped with Ki-48s was the only Japanese air unit in China proper to engage the Soviets, although others were advanced in preparation.It flew 20 sorties against the Soviets during 14 August 1945.