In 1969, Three-B amalgamated with the Kwangjen Primary School orchestra to form the "Chinese Children's Orchestra." When the group went to the Philippines, Lee went as advisor.
民國五十八年，台南「三 B」和台北光仁小學的管樂團合組「中華兒童管弦樂團」，去菲律賓參加音樂節，由郭美貞指揮、李淑德擔任顧問。