  A major milestone in the era of noisy intermediate scale quantum computers is
\textit{quantum supremacy} [Nature \textbf{574}, 505 (2019)] claimed on the
Sycamore quantum processor of $53$ qubits, which can perform a random circuit
sampling task within $200$ seconds while the same task is estimated to require
a runtime of $10,000$ years on Summit. This record has been renewed with two
recent experiments on the Zuchongzhi $2.0$ ($56$ qubits) and Zuchongzhi $2.1$
($60$ qubits) quantum processors. On the other front of quantum supremacy
comparison, there has also been continuous improvements on both the classical
simulation algorithm as well as the underlying hardware. And a fair
justification of the computational advantages for those quantum supremacy
experiments would require to practically simulate the same problems on current
top supercomputers, which is still in lack. Here we report the full-scale
simulations of these problems on new generation Sunway supercomputer, based on
a customized tensor network contraction algorithm. Our benchmark shows that the
most challenging sampling task performed on Sycamore can be accomplished within
$1$ week, thus collapsing the quantum supremacy claim of Sycamore.
Additionally, we show that the XEB fidelities of the \textit{quantum supremacy
circuits} with up to $14$ cycles can be verified in minutes, which also
provides strong consistency check for quantum supremacy experiments. Our
results redefine quantum supremacy baseline using the new generation Sunway
supercomputer.
