No.5 Do not send the smile emoji to express your positive feelings.
第五，不要用 “微笑”來表達你的積極情緒。

The emoji "Smile" used to represent kindness can sometimes indicate unhappy and dismissive feelings. For example, you can use it to reply with when you disagrees with something or do not want to continue the conversation.
“微笑”這個表情曾經是用來傳達善意和友好的，但有時它會暗示難過或者輕蔑的情緒。例如，當你不同意別人的觀點或者想結束對話時，你可以回復這個表情。