While discussing a strategic alliance with one company it is seen as disreputable to meet with competitors and to explore other opportunities at the same time. Nothing wrong with conducting due diligence, but you should first inform the potential partner that this is your intention. Sometimes it is necessary to conduct many meetings and adhere to proper business etiquette. In some countries punctuality is essential and in others time may be a flexible concept according to the season. The international scene is tricky, costly and complicated.
Success takes a commitment and a long-term view.