Authorea

Introduction

\label{sec:introduction}

With some new text.

And and equation:

\begin{equation} \label{eqn:eq_1} \label{eqn:eq_1}1+2=3\\ \end{equation}

\begin{equation} 1+2=3\\ \end{equation}

\begin{equation} b=\frac{a}{b}\\ \end{equation}

…and here we refer to Eq. \ref{eqn:eq_1} to see if it works.

And, how about referring to Section \ref{sec:introduction}?

And, how about referring to Section 1 Introduction?