Gautama Buddha instructs the queen to contemplate (or visualize) 13 aspects of Pure Land in order to be reborn there. In a sense, these visualizations describe the process in which one relocates from earth to Sukhavati after death.
The 13 aspects of Pure Land to be visualized are:
(1) The setting sun.
(2) The expansive sea.
(3) The ground of Pure Land.
(4) Trees in Pure Land.