English: [From Vietnamese Wikipedia:] In 1995, Do Thi Phuong Bao improved the traditional zither to help it perform traditional pentatonic melodies, and at the same time, to perform 12-note melodies of Western music . Her improvement project has 4 main points: Expanding the table top to add strings to increase the range; Raising the height of the sound box made of sycamore wood to increase the efficiency of the resonance box, helping to increase the tone and volume; Continuous shaft legs; Adding a tuning set. Her improvement project of the zither was evaluated as excellent by the Scientific Council, and was also granted a Patent.
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.