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Did you mean shi kun cheng (2 results)?
Toilet revolution in China.
Cheng S, Li Z, Uddin SMN, Mang HP, Zhou X, Zhang J, Zheng L, Zhang L. Cheng S, et al. J Environ Manage. 2018 Jun 15;216:347-356. doi: 10.1016/j.jenvman.2017.09.043. Epub 2017 Sep 21. J Environ Manage. 2018. PMID: 28941832 Free PMC article.
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