In Hong Kong practice, the "up track" refers to northbound, and the "down track" refers to southbound. This old practice on the British Section of the Kowloon-Canton Railway, now called the East Rail, is followed on the West Rail. In other words, trains towards the city center of Kowloon is the "down" direction instead of the "up direction ". "Northbound" and "southbound" are, nonetheless, more commonly used. On the original metro network of the MTR, platforms for the general direction towards the depot are numbered with odd numbers, whereas platforms for the opposite direction are numbered with even numbers. Depots are usually located on or near the end of MTR lines. Exceptions are stations that are located further than the depot, such as the stations of Ngau Tau Kok and Kwun Tong on the Kwun Tong line.