They also are spacing out the excavations to keep the site a top tourist attraction for as long as possible. They have a timetable for openng that site that stretches over centuries. At least that is what they told us when I was there in 1983.
It seems to me they wouldn’t need to milk it like that to keep it a top tourist attraction. Not that that kind of thinking from the Chinese surprises me. To my mind it would always be fascinating. It’s not like they’re making any more extensive ancient emperor’s tombs. lol