  Recently, multiple pulsar timing array collaborations have presented
compelling evidence for a stochastic signal at nanohertz frequencies,
potentially originating from cosmic strings. Cosmic strings are linear
topological defects that can arise during phase transitions in the early
Universe or as fundamental strings in superstring theory. This paper focuses on
investigating the detection capabilities of Taiji, a planned space-based
gravitational wave detector, for the gravitational wave background generated by
cosmic strings. By analyzing simulated Taiji data and utilizing comprehensive
Bayesian parameter estimation techniques, we demonstrate a significant
improvement in precision compared to the NANOGrav 15-year data, surpassing it
by an order of magnitude. This highlights the enhanced measurement capabilities
of Taiji. Consequently, Taiji can serve as a valuable complementary tool to
pulsar timing arrays in validating and exploring the physics of cosmic strings
in the early Universe.
