of the e-folding timescale ranging from 100 Myr to 10 Gyr in step of 0.2 dex. We refer to @marchesini09 for a detailed analysis of the systematic uncertainties on the SMF measurements due to the different SED-modeling assumptions. Figure \[fig-fast1\] shows the observed SEDs of the mass-selected sample at $3.0 \leq z < 4.0$ together with the best-fit stellar population models from FAST for our two sets of SED-modeling assumptions.

The $3 .0 \leq z < 4.0$ Mass-selected Sample {#subsec-sample}
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We constructed a mass-selected sample of galaxies at $3 .0 \leq z < 4.0$ to study their observed and rest-frame properties, as well as to derive more accurate measurements of the high-mass end of the SMF of galaxies at $3 .0 \leq z < 4.0$.

[lcccccccc]{} C1-4890 & 26.27 & 24.90 & 22.39$\pm$0.16 & 3.47$^{+0.34}_{-0.50}$ & 11.70$^{+0.17}_{-0.04}$ (11.67$^{+0.07}_{-0.24}$) & 40.7$^{+188}_{-25.3}$ (33.9$^{+313}_{-20.1}$) & 1.4$^{+0.6}_{-0.4}$ (1.2$^{+1.2}_{-0.4}$) & 9.1$^{+0.1}_{-0.2}$ (9.2$^{+0.1}_{-1.0}$)\
C1-6110 & $>28.4$ & 24.91 & 23.11$\pm$0.16 & 3.58$^{+0.32}_{-0.25}$ & 11.41$^{+0.07}_{-0.13}$ (11.30$^{+0.08}_{-0.19}$) & 0.0$^{+0.1}_{-0.0}$ (0.0$^{+0.1}_{-0.0}$) & 1.0$^{+0.6}_{-0.2}$ (0.8$^{+0.4}_{-0.5}$) & 9.2$^{+0.0}_{-0.3}$ (9.2$^{+0.0}_{-0.1}$)\
C1-7340 & 28.87 & 24.32 & 23.07$\pm$0.15 & 3.41$^{+0.36}_{-0.27}$ & 11.46$^{+0.07}_{-0.11}$ (11.31$^{+0.07}_{-0.11}$) & 8.3$^{+11.6}_{-6.5}$ (2.3$^{+4.1}_{-2.3}$) & 1.2$^{+0.4}_{-0.4}$ (0.7$^{+0.5}_{-0.2}$) & 9.2$^{+0.1}_{-0.1}$ (9.2$^{+0.1}_{-0.1}$)\
C1-15182 & 25.88 & 22.97 & 21.62$\pm$0.09 & 3.56$^{+0.11}_{-0.11}$ & 