Morse's telegraph was quickly spread to countries around the world due to its simple structure and effectiveness. In 1850, the submarine telegraph cable was successfully laid in the English Channel; in 1855, the submarine cable crossed the Mediterranean and the Black Sea; in 1858, the submarine cable across the Atlantic Ocean was also successfully laid. The realization of telegraph communication shortened the distance between the European and American continents, thus promoting the development of world industry. Cable telegraphy became one of the biggest news sensations in the mid-19th century, and it was also an important milestone in the history of human communication. Morse obtained a patent for the invention of the telegraph, but when he announced this new invention to the public, some people did not understand it. They ignore the facts and believe that using wires to transmit information is simply a fantasy. At that time, the communication method of delivering letters by horse-drawn carriage was still popular. So Morse began to gain government support and implement the long-distance telegraph line project.