During a recent inspection tour of villages in the region of Ningxia, Chinese leader Xi Jinping emphasized his goal for China to become “a moderately prosperous society.” This catchphrase was coined soon after he took power in 2012, and is his flagship economic policy.Xi also penned a May 31 article in Qiushi, the Chinese Communist Party (CCP)’s official magazine, that China is advancing toward achieving that goal, with “400 million people in the middle class.”His standard for middle class was: an annual household income of 100,000 to 500,000 yuan ($14,160-$70,810). But in China, multi-generational households living under one roof are...