Why is "Qianlong Tongbao" trending?

Wikipedia Overview

Qianlong Tongbao is an inscription used on cash coins produced under the reign of the Qianlong Emperor of the Qing dynasty. Initially the Qianlong Tongbao cash coins were equal to its predecessors in their weight and quality but as expensive military expenditures such as the Ten Great Campaigns began to take their financial toll on the government of the Qing dynasty the quality of these cash coins started to steadily decrease. The weight of the Qianlong Tongbao was changed several times and tin was added to their alloy to both reduce costs and to prevent people from melting down the coins to make utensils. As the intrinsic value of these coins was higher than their nominal value many provincial mints started reporting annual losses and were forced to close down, meanwhile the copper content of the coinage continued to be lowered while the copper mines of China were depleting. The Qianlong era also saw the conquest of Xinjiang and the introduction of cash coins to this new region of the Qing Empire.