Not good. Golden cicadas and turtles are both animals and should be kept in a suitable environment indoors or outdoors. Placing them underground in the yard will be affected by the environment and climate. The living environment is not stable and safe enough, and they are prone to illness or death. For golden cicadas, they are insect-like animals that need suitable temperature, humidity and light conditions to survive. If placed underground, it will be affected by environmental factors such as temperature and humidity, resulting in stunted growth and development or death. For turtles, they need enough space and sunlight and can be kept indoors or outdoors. If placed underground in the yard, they will be affected by the underground environment, such as temperature, humidity, oxygen content, etc., and will also be restricted by food and water sources, affecting their health and survival.