Xiaomi basically killed Shanzhai smartphones (the sector of all Shanzhai techs chosen by the OP) by releasing Xiaomi (and later Redmi) smartphones.
Xiaomi made Android smartphones affordable. How affordable? Here's a clip of the debut event of Xiaomi's first smartphone back in 2011:
https://www.bilibili.com/video/BV1Xx411v7XX/
Scrub to 01:54. That's a table of the flagship smartphones at that time. The last column of the table is the price in CNY. 3k, 4k, 5k -- around that range.
Now scrub to 03:20 where their CEO announced the MSRP. Listen to that 30-second-long "wow". Look at that price. The astonishment was real.
That's the price range of Shanzhai smartphones.
On a flagship-spec'd smartphone.
That's monumental in the history of smartphone evolution in China. Ask any friend of yours born & raised in mainland China. I bet none would argue otherwise.
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Disclaimer: I moved to the US in 2017, and my experience since then with tech trends in China has been scarce.