After all, the illustrations in the paper are content-oriented, and it is difficult to draw a cool picture with little data/simple logic;

Professional drawings shall be drawn with corresponding professional software as far as possible;

Make great efforts to create miracles, and the final effect of illustration is directly proportional to the time cost (learning software+drawing+debugging). As long as you are patient, curious and try more, even the MS Office series will not let you down.

The most important thing in painting is professionalism, followed by "vector+color matching+font+layout";

Sometimes the bottleneck lies in ideas rather than tools. You can browse Nature and Science for scientific research, and there are many drawing schemes worth learning.

Learn AI and PS if you have the energy, and it will be even worse later.