Back in Beijing, Pavement Calligraphy

Not me, but family members: a photo just received from Beijing

Photos: NMP

It reminds me of a photo I took many years ago:

On some health and pollution issues, The Lancet (abstract)

Prevalence and risk factors of chronic obstructive pulmonary disease in China 

(the China Pulmonary Health [CPH] study): a national cross-sectional study