Why did the survey I participating prompted me that I had participated before?

(1) In order to prevent a few users from maliciously repeating the in surveys, we have imposed strict restrictions on every survey.  A member can only answer once for each survey. The reminding notice will pop up if the system found you have particated in the survey before.
(2) Due to the huge amount of website visitors, sometimes the speed of opening the survey state survey page will be slower or you will be interrupted in the middle of the survey. In this case, please be patient or refresh the page, do not rush to close the page.
(3) If you have participated in the same survey on other websites, you will also be reminded that  "You have participated in this survey."