Well, yuri in manga basically means stories centered around female-female romantic connections. It can show different aspects of these relationships, like emotional struggles, sweet moments, and sometimes even physical expressions of love.
I'm not sure. To determine if it's yuri, you'd need to look at the depth and nature of the relationships between the characters. Sometimes it's not straightforward and could be open to debate.
Yan Bingyun and Shen Wan 'er were characters from the novel " Celebrating Years." Yan Bingyun was a spy sent by the Qing Kingdom to Northern Qi, and Shen Wan 'er was the eldest daughter of Northern Qi. Shen Wan 'er did not know Yan Bingyun's true identity at first, but she gradually fell in love with him. However, Yan Bingyun did not have any sincere feelings for Shen Wan 'er. He was only using her to obtain information about Northern Qi. Even so, Shen Wan 'er's feelings for Yan Bingyun were very deep. There was no clear description of their ending in the literature.