Hello, Lingnan University in history did merge with Sun Yat-sen University in the major adjustment of departments in 1950, and the former campus of Lingnan University, Lekangyuan, is now the South Campus of Sun Yat-sen University. This is a fact and can't be wrong.

The first point needs to be explained. The original Lingnan University was not an ordinary university. Its influence was absolutely considerable at that time. Later, after Lingnan University was merged by Sun Yat-sen University, Hong Kong people reopened Lingnan University (now Lingnan University in Hong Kong) in Hong Kong. The specific history can refer to the following links:

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The second point needs clarification. There is absolutely no Lingnan University in Chinese mainland now. You may be talking about Lingnan College of Sun Yat-sen University, which was founded in 1988 (just to commemorate the former Lingnan University) and has always been a famous school of Sun Yat-sen University. Basically, high-scoring candidates are concentrated in this college, so this college is not an ordinary college.