Lu Jiao exposed this much for two reasons. First, she wanted to bewilder Zhao Lingfeng a little. Second, she wanted to see how reliable Zhao Lingfeng was by working on ice and oil production with him. If he proves himself to be reliable, she could stop worrying and partner up with him on the pharmacy.
Other than making money, she wanted to use the spiritual stream water she had to help others.
Zhao Lingfeng and Qi Lei were in shock and asked in unison, "Are you being serious?"
Lu Jiao smiled, "Naturally. Why would I lie to you? Honestly, I want to open my own pharmacy to help others. Medicine is far too rare in this dynasty, resulting in many people being unable to seek doctors. A weak cold can manage to take a life. If I have the resources to make medicine, I'll make sure the people have what they need to get well."
For example, if a cold could be cured with cold medicine, it wouldn't be a big deal at all.