L. P. Xin, X. F. Wang, J. Y. Wei, Y. L. Qiu, J. S. Deng,
J. Wang, X. H. Han and C. Wu on behalf of EAFON report:
We observed GRB 150518A (Kawamuro, et al., GCN 17825)
with Xinglong 0.8-m TNT telescope during 2015-05-20,
16:51:46 and 18:16:34 (UT), bout 43.2-44.7 hour after the trigger time.
No any source was detected in our 17*300sec R-band coadded image within
the Swift-XRT error circle (Sbarufattim et al., GCN 17827) and at the
location of the reported source (Xu et al., GCN 17829; Mao et al., GCN 17830)
down to the 3 sigma limit of 20.7 mag, calibrated by USNO B1.0 R2 mag.