The Laohu-shaped system is similar to today's bass banhu, which is responsible for playing the main tone of the melody.

The drum is made of wood, about 13 cm long, about 10 cm in diameter, and covered at one end with a panel made of paulownia wood with a thickness of about 4 mm. The harp is made of wood and is about 50 cm long. The way of playing is similar to the second handle. And the left hand also carries a steel finger cuff. Lao Hu Hu's tuning is sol and do, which is the lowest range of the three instruments.