'Unfinished' Tieguanyin

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With high roast Tieguanyin, such as that produced by Fukien, Seadyke, etc, I have read that there is a particular rough tea that is purchased from the farmers, which is then repeatedly roasted by the teahouse themselves. I'm assuming that this tea is not processed in the same manner as the nowadays very popular green styles. Is there a name for such a tea, and are there any vendors that have it?