Language is a method for communication, not only a bridge for people’s connections but also a tool for relationship building. When we met a new person, we need to build a new relationship, except the eyes contact or a smile, we just need the language to communicate, and let him or her know what we mean and what we want to express. Therefore, all four skills (listening, reading, speaking, writing) are equally important, because the four skills complete a full conversation, if we lost one of them, the conversation is invalid.