Introduction to the Sheepskin Masked Ledger: The 1,661 volumes of the "Sheepskin Masked Ledger" record the operating conditions of Kailuan from 1901 to 1952.
Attraction
Introduction to the Sheepskin Masked Ledger: The 1,661 volumes of the "Sheepskin Masked Ledger" record the operating conditions of Kailuan from 1901 to 1952.