How to open the spirit gathering array of celestial survivors?

1, practice and then follow the plot. When you stop at the page of cutting sacred trees in Tiangong Square, you should click the plus sign to the right of the first food to count 16 people. 2. Then add a plus sign on the wood and stone, and each point is 2 people. Then wait for production for about 30 seconds, and then you can go out and unlock the poly spirit array.