This site introduces unknown composer Emanuel Bach (C. P. E. Bach). This English version was translated from Japanese one by ChatGPT.
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonatina in D Major Wq. 64-5 (H. 11) is one of the particularly captivating works within his keyboard music. This sonatina possesses a bright and lively atmosphere, making it accessible and appealing to listeners. While its structure is simple, it features clever harmonic changes and rhythmic innovations. Notably, the flowing melodic lines and dialogic passages leave a strong impression. For performers, it offers technical challenges while also providing opportunities to showcase expressive capabilities. This work well exemplifies Bachʼs unique style and the characteristics of the transitional period to Classical music.