Because the stone is granite, its preservation is excellent, according to what I've read.

Fuzhou has sprouted those highrise urban towers that seem to be all over China now. They have fancy hotels and spas, and all the luxury chains of stores. A busy city of 6.6 million, an international airport with 4 million passengers in a year; a far cry from the old seaport town of the days of sail. Now it's container shipments.