The Marmoset Brain Mapping Project was launched in Nov 2016, aiming at building comprehensive MRI-based marmoset brain atlases and tools to facilitate neuroimaging and connectome studies of marmosets. With supports and helps from multiple labs, we have made significant progress during these years, not only in developing atlases for mapping the marmoset brain, but also in pushing the resolution limit of non-human primate MRI (Liu, et al, Neuroimage, 2018; Liu, et al, Nature Communication, 2019; Liu, et al, Nature Neuroscience, 2020). These efforts resulted in useful atlases, tools, and applications for the marmoset research, and unique and valuable dMRI data that can be of interests to researchers who are in the MRI research field. Via the website (marmosetbrainmapping.org), we shared all of our fruits, including raw data, to the research community. Our "effort-tree" is still growing and we hope the current and the future fruits will promote open-science and contribute to a better understanding of the brain by using marmoset animal models.