Control is according to the established goals and standards for the activities of the organization to carry on the supervision and inspection, found that deviation, corrective measures, can make the work according to schedule, or proper adjustment plan for the intended purpose. Control work is a continuous and recurring process, which is aimed at ensuring that the actual activities and results of the organization are consistent with the expected goals. The marriage certificates of the children always mention the death or not of their parents. In the most recent civil status records, the date and place of death are even mentioned. Similarly, the death certificates of the children make it possible to know whether their parents were deceased or not, but without more precision. Directional orienteering) may be a bit weird for Chinese, but it has been popular in Europe and the United States for years, and activists need maps and compass to read terrain, topography, directions, etc., through unknown places, rich in content and full of fun.