Is it true that Leo proposed to White Deer?

No, it's not true that Leo proposed to White Deer.

Although there have been media reports that Leo proposed to White Deer, these reports have not been officially confirmed. And just because they were photographed eating at Hengdian Hotel late at night doesn't mean they love each other. Leo suddenly said "I want to marry you" to the Millennium in the set of "Long Moon Blooming", but this may be just a joke during filming, and it can't be used as evidence of their true feelings. Therefore, it is safe to say that Leo's proposal to Bailuyuan is untrue.