The differences and differences between writing letters, sending emails and sending short messages. Find a solution

Write a letter: the time period is too long. When you see something, your feelings are real. As the saying goes, seeing things is like seeing people, and attaching importance to feelings. Except for bank dunning letters ~ ~ ~

Email: It has many business purposes, large capacity and powerful multimedia functions, just like a notice.

SMS: Convenient, anytime and timely, used for instant communication of things that are inconvenient to call or say.