How to reset chapter and section counter with \part* - latex

Question

Sorry for bad english
I have a problem with my Latex code (I'm not very good in coding). I want an output like this:
Part I
Chapter I
Chapter II
Part II
Chapter I
Chapter II
I also wanted to create a box around my title of the parts , this doesn't work like I wanted, so I used \part* and \addcontentsline{toc}{part}{PART I} (to write the line in the table of content).So the code is:
\fbox{\begin{minipage}{\linewidth}
\part*{\begin{center}
PART I
\end{center}}
\end{minipage}}
\addcontentsline{toc}{part}{PART I}
\vspace{0.7cm}
I saw this methode to reset the counter of the chapters:
\makeatletter
\#addtoreset{chapter}{part}
\makeatother
but this doesn't work, I think it's due to use of \part*.
Has anyone an idea? THNANKS!
Hope the example bellow can help:)
\documentclass[a4paper,11pt,]{report}
\usepackage{hyperref}
\begin{document}
\tableofcontents
\newpage
\fbox{\begin{minipage}{\linewidth}
\part*{\begin{center}
INTRODUCTION
\end{center}}
\end{minipage}}
\addcontentsline{toc}{part}{INTRODUCTION}
\vspace{0.7cm}
\chapter{Hello}
\section{my}
\newpage
\fbox{\begin{minipage}{\linewidth}
\part*{\begin{center}
CONCLUSION
\end{center}}
\end{minipage}}
\addcontentsline{toc}{part}{CONCLUSION}
\vspace{0.7cm}
\chapter{name}
\section{is}
\end{document}

Answer 1

As you already know the solution for \part, how about simply using this and make it look like \part*? This has the advantage that you could add the boxes around the part titles automatically.
\documentclass[a4paper,11pt,]{report}
\usepackage[newparttoc]{titlesec}
\titleformat{\part}[frame]
{\normalfont}
{}
{8pt}
{\Large\bfseries\filcenter}
\usepackage{titletoc}
\titlecontents{part}[0em]
{\vspace{2em}\large\bfseries\sffamily\relax}
{\contentslabel[\relax]{0em}}{}{\hfill\contentspage}
\usepackage{hyperref}
\makeatletter
\#addtoreset{chapter}{part}
\makeatother
\begin{document}
\tableofcontents
\part{INTRODUCTION}
\chapter{Hello}
\section{my}
\part{CONCLUSION}
\chapter{name}
\section{is}
\end{document}