As a young child, Lu was praised by his teachers for his perfect pitch. In third grade, he won a regional piano competition for children from northern Taiwan, and was awarded a scholarship to attend a class for musically gifted children established by the Ministry of Education. Lin Cho-liang, who would later become an internationally acclaimed violinist, was one of Lu's classmates.
從小就被老師稱讚有「絕對音感」的呂紹嘉，小學 3 年級即贏得北區 6 縣市兒童組鋼琴比賽冠軍，成為教育部針對「天才兒童」所開設的音樂特殊教育班一員，同期學生還有日後亦享盛名的小提琴家林昭亮。