After Ding Fan quickly refined a furnace of Supreme Rejuvenation Pills, he continued to refine medicine pills. In this situation, with his alchemy techniques exposed to Guo Linn and Ah Du, there wasn't much he could do. Although pill refinement is a deeply private matter, given the current environment, Ding Fan had no choice.
Moreover, Ding Fan wasn't worried about Guo Linn and Ah Du stealing his skills. After all, they were disciples of Long Ren's Thirty-Six Caves. Even if they did manage to learn some techniques, Ding Fan considered it a favor to Long Ren. He knew that while the two might understand some of the pill refining process, their skills likely weren't advanced enough to fully grasp his techniques and methods.
How much they could learn depended on their own fortune.
