According to its own diary of its temple, there are numerous time the ancient People live on Wudang Moutain saw multi colors plate size flying objects.
If we stay at top floor of a high rise, your watch will run faster by micro seconds than you stay at ground floor. Indeed, you need many years in order to generate this result. However, when it is higher distance like satellite in space. A time different may be 50 seconds a day when gravity is non existence or no longer generate impact towards space time.