CREATE TABLE table_78980 ("Perpetrator" TEXT, "Date" TEXT, "Year" FLOAT, "Location" TEXT, "Country" TEXT, "Killed" FLOAT, "Injured" TEXT)

What is Date, when Country is 'China', and when Perpetrator is 'Shi Yuejun , 35'?
SELECT "Date" FROM table_78980 WHERE "Country" = 'china' AND "Perpetrator" = 'shi yuejun , 35'
SELECT "Date" FROM "table_78980" WHERE "Country" = 'china' AND "Perpetrator" = 'shi yuejun , 35'