What do three degrees north latitude, fifty-three degrees north latitude, seventy-three degrees east longitude and one hundred and thirty-five degrees east longitude mean respectively?

On the map, the latitude line is a horizontal line, indicating the north-south direction; Meridian is a vertical line, indicating the east-west direction. Upper north and lower south, left west and right east, the higher the degree of north latitude, the higher the degree of south latitude. Vietnam is bounded by the equator, with north latitude and south latitude. For example, 53 degrees north latitude is farther north than 3 degrees north latitude, and 53 degrees south latitude is farther south than 3 degrees south latitude. The higher the east longitude, the farther east, the higher the west longitude, and the farther west. It is bounded by the 0-degree meridian, with the east longitude and the west longitude to the east. For example, east longitude 135 degrees is farther east than east longitude 73 degrees. To give a concrete example, the easternmost part of the territory of China lies a little over 135 degrees east longitude, the westernmost part lies a little over 73 degrees east longitude, the southernmost part lies a little over 2 degrees north latitude and the northernmost part lies a little over 54 degrees north latitude. New york, USA is located a little over 74 degrees west longitude, and China is east of the United States.