How is an ellipsis 省略号 written in Chinese?
在這裡輸入您的訊息...... （Type your message here...）
the formal type is ……and somtimes we use ... or 。。。to express the same meaning
All are wrong. Three dots "…" is one single character in Chinese font, like the comment by @SLS under his answer. It's not correct to written to six English dots, or three Chinese period marks.
The last one is right，we use 6 dots in china，“。。。”is just three “。” sometimes will be used to have a chat online