Taiji data challenge for exploring gravitational wave universe

The direct observation of gravitational waves (GWs) opens a new window for exploring physics from quanta to cosmos and provides tool probing the evolution universe. GWs detection in space covers broad spectrum ranging over more than four orders magnitude enables us study rich physical astronomical phenomena. Taiji is proposed space-based GW mission that will be launched 2030s. exposed numerous overlapping persistent signals buried foreground background, posing various data analysis challenges. In order empower potential scientific discoveries, Mock LISA Data Challenge (LDC) were developed. While LDC baseline framework, first needs updated with realistic simulations adjusted detector responses Taiji's constellation. this paper, we review objectives roadmap Taiji, as well technical difficulties generation strategy, present associated contrast LDC, utilize second-order Keplerian orbit second-generation time delay interferometry techniques. Additionally, employ model extreme-mass-ratio inspiral waveform stochastic background spectrum, which test general relativity measure non-Gaussianity curvature perturbations. Furthermore, comprehensive showcase parameter estimation using toy dataset. This not only demonstrates but also serves validate effectiveness pipeline. As challenge aim build an open ground related sources sciences. More details can found on official website at http://taiji-tdc.ictp-ap.org.