The holes left by the stiff resistance of Korean workers were filled by almost forcibly gathering former workers of communication services who had been dismissed for having done wrong or retired for health reason.
これは朝鮮人労働者が激しく抵抗したためであったが、欠員は以前通信事業に従事していて悪事を働いた為に免職になったものや、病気で退職したものを半ば強制的に集めて当初はしのいだという。