How Import partial symbol

Question

I need import a partial symbol like this

Answer 1

The partial symbol is similar as your picture (I think). I have used \usepackage[lite]{mtpro2} as you have indicated in your request.

\documentclass[a4paper,12pt]{article}
\usepackage[lite]{mtpro2}
\usepackage{newtxmath}
\begin{document}
\[\frac{\partial w}{\partial s}=\frac{\partial w}{\partial x}\frac{\partial x}{\partial s}+\frac{\partial w}{\partial y}\frac{\partial y}{\partial s}\]
\end{document}

For another symbol of partial you can see this my question Modify characters of mt2pro[lite] using Times

ADDENDUM after the comments of the user:

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\usepackage{mathptmx}
\DeclareFontFamily{U}{nxlmi}{}
\DeclareFontSubstitution{U}{nxlmi}{m}{it}
\DeclareFontShape{U}{nxlmi}{m}{it}{
  <-6.3>    nxlmi05
  <6.3-8.6> nxlmi07
  <8.6->    nxlmi0
}{}

\DeclareFontShape{U}{nxlmi}{b}{it}{
  <-6.3>    nxlbmi05
  <6.3-8.6> nxlbmi07
  <8.6->    nxlbmi0
}{}

\renewcommand{\partial}{{\text{\usefont{U}{nxlmi}{m}{it}\symbol{64}}\mspace{1mu}}}

\begin{document}
\[\frac{\partial w}{\partial s}=\frac{\partial w}{\partial x}\frac{\partial x}{\partial s}+\frac{\partial w}{\partial y}\frac{\partial y}{\partial s}\]
\end{document}