Siheyuan: How Does He Earn Foreign Exchange?

My writing capacity is limited and I don't want to write too long. The protagonist travels back in time to the courtyard next door at No. 95 Nanluogu Lane in 1950, but the summoning system has a wrong style. A group of ruthless characters from martial arts dramas come here, but they use their internal energy to eavesdrop on the excitement next door every day. Of course, everyone is here. The New World does not talk about listening to music. We visit the girls at the Opera Academy, we listen to Farewell My Concubine and meet Boss Cheng in the theater, and we listen to the live performance of the cross talk master. As for earning foreign exchange? Not by the way. Instruct workers to forge different Damascus steel knives from high carbon steel and low carbon steel.