Beijing time 20 13 12 14 "Chang 'e III" independently developed by China successfully landed on the moon on the night of 14. According to the above contents,

(1) As can be seen from the schematic diagram of the earth's revolution, when the earth moves to the position ② in the figure, the sun shines directly on the Tropic of Cancer, which is the summer solstice in the northern hemisphere, and the date is around June 22nd.

(2) Chang 'e III landed on the moon in 65438+February 65438+April, between the autumnal equinox (around September 23rd) and the winter solstice (around February 22nd, 65438+around February 22nd). Looking at the map, we can see that when the earth moves to position ③, it is the autumnal equinox in the northern hemisphere, and when it moves to position ④, it is the north. At the autumnal equinox, the point of direct sunlight is the equator, and then the point of direct sunlight moves south. In winter solstice, the direct point of sunlight is the tropic of Capricorn, that is, the direct point of sunlight is in the southern hemisphere.

(3) When Chang 'e III landed on the moon, the earth was running between the autumnal equinox and the winter solstice.

(4) Xuzhou, located in the northwest of Jiangsu Province, belongs to the northern hemisphere. When Chang 'e-3 successfully landed on the moon, the direct point of the sun moved from the equator to the tropic of Capricorn, farther and farther away from the northern hemisphere, so the changing trend of the length of day and night in the northern hemisphere was that the day became shorter and the night became longer.

Therefore, the answer is: (1) summer solstice; (2) South; South; (3)C； (4)D。