Complex sentence: In 1930 he went to study at the University of Berlin in Germany and received a Ph.D. in 1934 with a thesis on β decay spectrum (ThB + C + C的β能谱) under the supervision of Lise Meitner before returning to China.
Split into simpler sentences: In 1930 he went to study at the University of Berlin in Germany. Four years later in 1934, Wang Ganchang received his Ph.D. with a thesis on β decay spectrum (ThB + C + C的β能谱) under the supervision of Meitner before returning to China.