At the end of the movie Let Flowers Go, didn't the woman who went to Yunnan meet Geng Hao?

No, my friend. Look carefully. This movie is narrated in two timelines at the same time. It was not clear at first, but it was clear at last. Bo Huang's story line is that he divorced his wife, and then go to dali, where we first met; Yolanda's timeline is before Bo Huang's time. It tells that she went to Yunnan to treat emotional trauma, and then met Bo Huang at the end of the story.