Answer: Guangzhou Metro Line 3 and Line 3 have three different lines (in the past, there were two lines, but in order to speed up the transportation capacity and solve the problem of long waiting time and congestion, the government has now added a through-train line, and the airport goes directly to Panyu Square in the north). Is it unique to Guangzhou in the world? I don&;t know why I don&;t distinguish it. It is estimated that the largest number of passengers in the world change the wrong train route. I accidentally take a seat (about five or six times a year), and I will get in the wrong direction if I am not careful (attention, passengers, the transfer to Sports West has become different recently). The north and south of Line 3 collude with the whole city of Guangzhou, passing through Huadu District, Baiyun District, Tianhe District, Haizhu District and Panyu District, reaching the T2 terminal of Huadu Baiyun Airport in the northernmost part, transferring to Line 3 (Panyu Square Line) with the same number via Sports West Road in the downtown area, and then reaching Panyu Square in the south, with a straight line distance of nearly 100 kilometers. The airport section of Line 3 (from the airport to Sports West Road in the north) connects with Line 9 in Huadu District. Line 9 is the only subway line in Huadu District at present, with a large number of travelers. The most convenient way for the whole Huadu District to travel in Guangzhou is to transfer to Line 3 through Line 9. When there was no line 9 before. Huadu district, take a bus or transfer to the airport line 3 to enter the city, and now after the opening of line 9. In Huadu District, Guangzhou, more people choose Line 9 to transfer Line 3 into the urban area. In addition, starting from Renhe Station, the only quick choice for the central and northern parts of Baiyun District to enter Guangzhou City is to transfer other lines through Line 3 to enter various parts of the city. So Line 3 brings together the largest subway traffic in the world. During the rush hour, people have to wait for the bus for more than half an hour every holiday. The common people waiting for the bus queue up from the ground entrance to the subway platform. It is not a hollow reputation to be called &”;the line of death&”; by passengers. The above is my comprehensive analysis. If you think my answer is reasonable, please click to follow me and support me. Thank you.