I started with the Sentry abridged reissue; I will continue with the U. Washington Press reprint of the whole work.
The first half of the book documents life in Chongqing under the rule of the corrupt and semi-despotic Kuomintang. A constellation of characters appear, relief workers, boorish businessmen, educated Chinese bohemians and dandies from the comprador class, peasants worn down by disease and malnutrition. The New Zealander Rewi Alley, director of the industrial cooperatives in unoccupied territory (who later lived in the PRC at the invitation of the Communists), lends the author a loess cave inhabited by two puppies and an eagle. He demystifies the exoticism of the land and exposes the true nature of the social relations. It's an object lesson for the intentions of U.S. foreign policy (our current Afghanistan commitment should come to mind). The concrete and vivid descriptions of the elegant prose are sometimes assisted by the sketches, but a contemporary audience could be offended by what it perceives as an array of stereotypes.
In the second half of the book, the author describes the collapse of the Kuomintang front below the Yangtse, when the Japanese chose to isolate and starve South China. He describes an existence divorced from the realities of the war; architects at universities who hopefully describe a world to build after the victory are shot with their students; the nightlife and the unusual yet vibrant mixture of cultural and nationality is wiped away by the Japanese offensive taking place at the same time as D-Day, the collapse of Fascist Italy, and the Soviet victories over Germany. Famine visits the landscape yet the peasants are bled dry by the government's and their middlemen's exactions. Meanwhile the propaganda machine depicts a China opposite the grim reality on the ground. No doubt as today some politician or high-ranking officer was bruiting fake news about nonexistent progress.
His analysis of US foreign policy, as governed by businessmen and amateurs, makes sobering reading, and can be easily applied to our current debacles.