1. The piano piece "The Blue Danube" is a work by the famous Austrian musician Johann Strauss Jr.

2. Johann Strauss (full name: Johann Baptiste Strauss, English: JohannStraussJr. German: JohannBaptistStrau?, October 25, 1825 - 1899 June 3), is a famous Austrian composer, conductor, violinist, and pianist.

3. Johann Strauss, often called Johann Strauss II, was born on October 25, 1825 in Vienna, Austria. His father, Johann Strauss, was a self-taught musician who established a musical dynasty in Vienna, composed waltzes, gallops, polkas and quartets, and published more than 250 works. Young John went on to write more than 500 pieces of music, 150 of which were waltzes, and he surpassed his father's productivity and popularity. Works such as "The Blue Danube" helped establish Strauss as the "Waltz King" and gave him a place in music history. He died in Vienna on June 3, 1899.

4. Johann Strauss has the same name as his father, and both are world-famous for composing waltzes. For the sake of distinction, people add the words "老" and "小" in front of their names. Johann Strauss the Younger is known as the "King of Waltz".