Investor Presentaiton

Plastic piping systems business: ASP & GP margin analysis ASP per tonne - by material GP margin-by material (RMB) 15,431 14,250 8,116 7,781 (RMB) 2019 MPVC products 2020 9,143 15,118 33.2% 29.1% 30.1% 28.7% 28.4% 23.3% 2021 2019 2020 PVC products Non-PVC products ASP per tonne - overall 28.9% 10,773 9,887 9,395 2021 Non-PVC products GP margin overall - 30.2% 25.9% 2019 2020 2021 2019 2020 2021 16

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