Puquan is a hi-tech company dedicated to new irrigation systems development and marketing. With the idea-'to supply water whenever plants need' in mind, Puquan started to explore new theory for irrigation in 2004. Inspired by natural capillary force, a new concept called �¢??trace quantity irrigation (TQI)�¢?? was coined and later TQI irrigation technology was invented and patented, which proved to be more efficient, convenient and adaptive than drip irrigation.