520134 means I love you forever. You say W’èr líng for the first three digits (5, 2, 0). The Mandarin phrase for I love you is Wǒ ài nǐ, and the pronunciation of W’èr líng is extremely close to that. The last digit, 1314, sounds a lot like the Chinese phrase yībèizi, which translates to forever, in Mandarin