Zhang Yi: So there would be no trace at all?

Shenghua Tu: No. However it would be too cruel and costly to practice on any living human being. What to do? Well, practice on the rabbit.

Zhang Yi: Besides this technique, any other techniques for him to learn at all?

Shenghua: Another skill was printing. Well, at that time, CCP had no printing press. What to do? Well, you need to print a few copies for time being. And there was no carbon paper, either. It doesn’t matter. Just use the gentian violet of our daily life, which is used as the ink. Write with either fountain pen or pen. You write your poster for instance. Then use what the northerners call jelly or what the Shanghai people call agar. Melt the jelly or agar in a flat bottom basin. Hot warm melts the agar and when it cools down it becomes a solid jelly. You put your written poster face down onto the jelly. Then，the gentian violet penetrates into the jelly. What you have written has become a negative plate on the jelly now. Well, you put white paper onto the jelly. You will be able to make 5 to 6 copies. Maximum 6 copies. The fifth and the sixth copies will be less readable.

Zhang Yi: So, during that time, a lot of things had been learnt.

Shenghua: Correct. So that when it was 1927. Oh, besides, he learnt things such as explosives and bombs. He himself liked these. When it was December 20, 1927, he wrote a letter in Russian to the dean of the Orient University. In his letter, he said that China was under armed revolution and uprisings. So he needed to learn the skills to make explosives and bombs as early as possible. He also wanted to learn the skill for poisonous gas. So that he would be able to cope with the armed uprisings in China.

Zhang Yi： What was the dean’s reply?

Shenghua: The dean had written his comment on the letter saying Comrade Volodarski had been talked with. It was recommended that Comrade Volodarski talk over this issue with whom and whom.