This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
The Sinfonia in G Major Wq. 173 (H. 648) by Emanuel Bach is one of the most vibrant works among his symphonies. This sinfonia, written in a bright and lively G major, begins with an energetic opening that captivates the audience. The dialogue between instruments is skillfully interwoven, with each part maintaining its unique voice while achieving overall harmony. The second movement unfolds a more serene melody, broadening the emotional range. In the final movement, the vitality returns, leading to a brilliant and powerful finale. This work, showcasing Bachʼs inventive orchestration and rhythmic ingenuity, marks an important step in the development of classical music.