What's it like to see your own bird on the light rail?

The moral of seeing a bird on the light rail is as follows:

It depends on what bird it is. Magpie is a good thing, crow is a bad thing, and other birds are meaningless.

There is an ancient legend that Jia Yi was an official in a desolate place in the Western Han Dynasty. One day, an owl flew to his house, and Jia Yi asked someone for divination to explain it. The answer was "When wild birds enter the room, the owner must go". Soon after, Jia Yi received a promotion notice, left this remote place and returned to Beijing to be an official.