What did Marco Polo write about silk production in Cambaluc?

In his account of his travels, Marco Polo described Cambaluc (the capital of Cathay) as a city of unparalleled splendor where rare and valuable goods from across the world converged. Regarding silk production and trade, he specifically noted that no fewer than 1,000 carriages and pack-horses loaded with raw silk entered the city daily. Furthermore, he reported that gold tissues and various types of silks were manufactured in the city to an immense extent.1