The gold ingots are roughly the size of iPhones, and the company gets them from the Nanjing bank. Then then put them through a machine that hammers them, repeatedly, until one gold ingot is nine metres long and as thin as a sheet of paper. Then they hammer them again, and again and again. And when they are small CD-sized roundels of thin gold, they cut them into squares and cut the squares into smaller squares, and then they hammer them again, until they are literally as thin as a cicada’s wings.

Miss Li is part of the process. She has to take a roundel of beaten gold, tease it gently off the paper with a goose feather, and then move it onto a new piece of paper, blowing gently on it to flatten it and move it around.

“It is very difficult training,” she says. “You have to pass exam where you blow middle candle out of three, without blowing out other two. Training for blow job took me eighteen months.”

I nod sagely.

Nanjing used to be called Jinling (Gold Hill), so the gold foil company based here couldn’t resist calling itself Jinling. Mr Ge, who is the sixth generation of his family to oversee Miss Li and her colleagues, takes me around the factory, and we have fun banging on an anvil with hammers, which was the way things were done before they automated so many elements of the process.

He takes me to the showroom, which is a Trumpish extravaganza of gold leaf on everything – gold leaf pianos, gold leaf Buddhas and other tat. Waiting for us there, unexpectedly, is his foreign liaison Viviana, a young Italian artist of some renown, who works with gold leaf in some of her paintings, and has ended up as a part-time greeter for foreign bigwigs who come to talk about painting their toilets gold, or something.

Viviana is very easy on the eye, and I think she would make a striking interviewee as both artist and employee, a welcome change from our usual run of middle-aged men, but the director immediately assumes that she works in another capacity and shouts at me to “stop chatting up the Russian” and to get on my marks ready to interview Mr Ge. He talks for a while about the history of gold leaf in Nanjing, and delicately describes his customers as devout religious believers, and not, say, ghastly billionaires. And that is another day done.

Jonathan Clements is the author of A Brief History of China. These events featured in Route Awakening S05E06 (2019).