The infinite gold key contains 60% gold. According to official website's inquiry, the gold content of Jiangsu Provincial Department of Education and Golden Key Science and Technology Competition is still very high, about 60%. The "Golden Key" Science and Technology Competition is a youth science and technology activity sponsored by the Provincial Civilization Office, the Provincial Association for Science and Technology and the Provincial Science and Technology Department with the approval of the Jiangsu Provincial Department of Education. This activity is devoted to popularizing scientific knowledge. Improving the practical ability and innovative spirit of primary and secondary school students is welcomed by education departments, students and teachers at all levels.