Unable To Refine Pills

She looked up startled and stared at the billowing clouds and thundering sounds filled the sky. She couldn't help but look at the man in white, secretly excited. 

He was refining fifth grade and above medicinal pills!

To alchemists, pill recipes were precious, in her spatial space she had quite a few recipes, and most of them were common recipes. However, fifth order and above pill recipes were rare and rarely seen. Therefore, she was unable to determine what sort of medicinal pill he was refining. 

When she saw the turbulent skies, she thought that he was at the last stage of condensing the pills and it would soon lead to the final stage of the refining process. However, another half an hour had passed, thunderous sounds continued sounding through the sky, but it had not struck.