I don't know if this was reported elsewhere: But SMIC is building a new fab. "The fab will process 300 mm wafers using mature production technologies, such as 28 nm and above."
and
"SMIC did not indicate when it expects the new fab to go online, but it is reasonable to expect it to become operational two or three years down the road."

This is in addition to the new FAB project announced earlier in the year. Also...they report:

"SMIC does have a 14nm process node with FinFETs, and is expanding this as well. In the first half of 2020 SMIC's 14nm-capable capacity was around 4,000 WSPM (based on the company's data from back then). By now, this capacity has increased to 15,000 WSPM, according to a CnTechPost story, which has not verified by the company itself."

https://www.anandtech.com/show/16931/china-smic-build-gigafab

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RyanBeck
made a comment:

Why do you think it will decline after 2023?

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DKC
made a comment:

The cyclical nature of semiconductors. A shortage so they overproduce then there is a glut. I think it is the nature of the semiconductor business. Fabs are expensive and take a long time to build so product has to be expensive to make it worthwhile, then everyone builds and they overproduce to recoop the expense. That is my thinking anyway.

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RyanBeck
made a comment:

Gotcha, thanks for elaborating on that!

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