Complex sentence: In the 1930s, Chinese painter Zhang Daqian produced several forgeries of Bada Shanren's works but they are easily spotted by the trained eye, because the modern copies were softer and rounder.
Split into simpler sentences: In the 1930s, Chinese painter Zhang Daqian produced several forgeries of Bada Shanren's works. But they are easily spotted by the trained eye, because the modern copies were softer and rounder.