Unrequited love is also a common theme. In some Chinese sad love stories, one person's love may not be fully reciprocated. And also, the idea of sacrifice is there. Sometimes, lovers are willing to sacrifice themselves for the sake of the other's well - being, like Lin Daiyu's heartbroken death in 'A Dream of Red Mansions' which was in a way a sacrifice of her love.
One main theme is the interference of external forces. For example, in 'The Butterfly Lovers', it was the feudal system that didn't allow Liang Shanbo and Zhu Yingtai to be together. Social hierarchies, family expectations, and traditional norms often play this role of separating lovers in Chinese sad love stories.
Illness or death is another theme. Sometimes one of the lovers gets seriously ill or meets with an accident that results in death. This sudden change makes the love story extremely sad. Just like in some melodramatic Chinese dramas where the female lead gets a terminal illness and has to leave her lover.
Another theme is transformation. In 'Liang Shanbo and Zhu Yingtai', they transform into butterflies at the end. This transformation represents the eternal nature of their love. It's like their love is so strong that it can change their forms and exist in a different way. It also reflects the Chinese idea that love can transcend the physical world.
Often, there is also the theme of sacrifice. The lovers in these stories are sometimes willing to sacrifice their own well - being or even their lives for the sake of their love. In 'Xiwangmu and Dongwanggong', although their story is not as detailed, their status as celestial beings implies a certain level of sacrifice in maintaining their relationship in the celestial realm.
One main theme is the struggle against fate. In stories like 'The Cowherd and the Weaver Girl', they are separated by the powerful will of the Queen Mother of the West, but they still try to be together. Another theme is loyalty. In 'Liang Shanbo and Zhu Yingtai', Zhu Yingtai remains loyal to her love for Liang Shanbo even after his death.
One main theme is the struggle against feudal constraints. For example, in 'The Butterfly Lovers', Zhu Yingtai and Liang Shanbo's love was hindered by the feudal idea that men and women should not freely interact and marry according to their own wills. Another theme is the power of true love that can transcend different realms, like in 'Cowherd and Weaver Girl' where a mortal and a fairy fall in love.
One main theme is heartbreak. For example, shayaris often describe the pain of a broken heart after a love has ended. Another theme is unrequited love. Many Hindi shayari express the sorrow of loving someone who doesn't love you back. It can be like 'Pyaar kiya, dil diya, magar tera dil mera nahi. Is kadar dukh hua, jaise dil ko toda mara nahi.'
Well, the theme of lost opportunities is quite common. In sad love stories, the characters may miss the chance to be together for various reasons, like hesitation or external forces. For instance, in some stories, a couple may have the opportunity to run away together but one of them fails to act in time. Also, the theme of sacrifice is often seen. A character might sacrifice their own happiness or even their life for the sake of their loved one, which makes the story sad. Another common one is the passage of time. As time goes by, love may fade or the lovers may change, resulting in a sad end to the relationship.
Well, in 'the sad love story', a major theme is probably regret. The characters may regret the things they did or didn't do in the relationship. Loneliness can also be a theme. After the love is gone, they might feel extremely lonely. And there could be the theme of sacrifice. Maybe one of the characters sacrificed a lot for the love that ultimately failed.
One common theme is separation. For example, in stories about war or migration, family members are often separated from each other, causing great pain and longing. Another theme is unfulfilled dreams. People may have big dreams but due to various reasons like poverty or social status, they can't achieve them, which leads to a sense of sadness.
One main theme is the struggle against family or social opposition. Just like in 'The Butterfly Lovers', their families' disapproval was a big obstacle. Another theme could be loyalty. For example, in stories where the lovers are separated, they remain loyal to each other no matter how long the separation is.