Economic risk is a nebulous term with a variety of definitions. In a nutshell, it is the risk that an endeavor will be economically unsustainable, for a variety of reasons ranging from a change in economic trends to fraudulent activities which ruin the outcome of the project.
The summer solstice arrives Sunday June 21. Those of us in the Northern Hemisphere know it as the longest day of the year.
Each time the moon moves into line with the earth and the sun a new month begins and this is called 'Chu Yi' or 'Shuo Ri' (the first day of a lunar month). The longest day of a year or Summer Solstice falls on the 21st or 22nd of June, and the shortest day is the Winter Solstice on either December 21, 22, or 23. Using these two annual events the year was divided into in 24 equal parts, each forming the 24 solar terms.