does the china's wealth had an impact on the kind of instruments that are traditionally used?

Yes. As China has become wealthier, its adopted more expensive Western instruments.

http://en.wikipedia.org/wiki/Traditional_Chinese_musical_instruments

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China's wealth has indeed had an impact on the kind of instruments that are traditionally used. The growth of China's economy and the increasing affluence of its population have created a demand for a wider variety of musical instruments, both traditional and modern.

Traditionally, Chinese music is known for its distinctive instruments like the pipa, erhu, guzheng, and dizi. These instruments have a long history and are deeply embedded in Chinese culture. However, with increasing wealth, there has been a resurgence of interest in traditional Chinese music, which in turn has led to a revival of traditional instrument-making techniques and the development of new instruments. Wealthy individuals in China have also become patrons of the arts, supporting musicians and instrument makers, thereby encouraging innovation and preservation of traditional craftsmanship.

Furthermore, increased wealth has also facilitated the import of instruments from other cultures. Many Western classical instruments, such as pianos, violins, and cellos, have gained popularity among the affluent in China. This can be partly attributed to the influence of Western classical music and the desire to explore different musical genres.

Overall, China's wealth has influenced the variety of instruments used in traditional music by revitalizing traditional instruments, supporting instrument makers and musicians, and promoting the import of instruments from other cultures.