The piano piece "Warm Love" originates from the province of Liaoning, China. This conclusion is based on the historical context and cultural background of the composition. "Warm Love" was composed by the Chinese composer Wang Jie in 1934, during the early 20th century. At that time, Liaoning was a region that had been under Japanese occupation, which significantly influenced the cultural and artistic landscape of the area. The piece itself reflects the emotional and social atmosphere of the time, with its melancholic and romantic melodies.

The choice of Liaoning as the province of origin is further supported by the historical data. During the Japanese occupation of Liaoning, there was a strong cultural exchange between the Japanese and Chinese populations. This interaction led to the blending of musical styles, which is evident in "Warm Love." The use of traditional Chinese musical elements, such as pentatonic scales and modal structures, combined with Western classical music techniques, reflects the unique cultural environment of Liaoning during that period.

Furthermore, the composition of "Warm Love" was influenced by the socio-political context of the time. The piece was written during a period of great social unrest and political instability in China. The emotional depth and complexity of the music are a reflection of the struggles and aspirations of the people during that era. The use of the piano as the primary instrument also signifies the influence of Western music on Chinese composers at the time.

In conclusion, the piano piece "Warm Love" comes from the province of Liaoning, China, due to its historical context, cultural influences, and the socio-political atmosphere of the time. The composition reflects the unique blend of Chinese and Japanese musical traditions, as well as the emotional landscape of the early 20th century in China.