How to change Chinese reference format in biblatex package?

Question

First I want to give a minimal working sample and my bib file.

The working sample is

\documentclass[a4paper,oneside]{ctexbook} 
%%%添加参考文献%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[backend = biber, style = caspervector, utf8, 
sorting = ecnty,seconds=true,maxnames = 9999,
ugly]{biblatex}
\addbibresource{liuref.bib}
\begin{document}

\supercite{Aoml1970},\parencite{Aecl1971},\parencite{Lyym1995}三种；


\printbibliography[title = {文献}, heading = bibintoc]  \nocite{*}

\end{document}

My liuref.bibfile is

@incollection{Aoml1970,
  title={Advice on modal logic},
  author={D. Scott},
  booktitle={Philosophical Problems in Logic: Some Recent Developments},
  editor={K. Lambert},
  pages={143--173},
  year={1970},
  publisher={Springer}
}

@phdthesis{Aecl1971,
    title    = {An Essay in Classical Modal Logic},
    school   = {Stanford University},
    author   = {K. Segerberg},
    year     = {1971},
    type     = {{PhD} dissertation},
    note={\url{http://lpcs.math.msu.su/~zolin/ml/pdf/Segerberg_Essay_1971.pdf}},
}

@article{Lyym1995,
  title={方法论研究},
  author={神州 and 华夏 and 北极 and 南京},
  year={1995},
  journal={辽阔大江},
  volume={5},
  pages={52-56},
  language={chinese}
}

@inproceedings{talbot97,
author = {Talbot, Nicola and Cawley, Gavin’},
title = {A fast index assignment algorithm for robust vector quantisation of image data},
booktitle = {Proceedings of the I.E.E.E. International Conference on Image Processing},
address = {Santa Barbara, California, USA},
year = {1997},
}

@article{molodtsov1999soft,
  title={Soft set theory—first results},
  author={Molodtsov, Dmitriy},
  journal={Computers \& Mathematics with Applications},
  volume={37},
  number={4-5},
  pages={19--31},
  year={1999},
  publisher={Elsevier}
}

I use xelatex+biber+xelatex+xelatex to compile and get the following result:

My GOAL is

1. I want to make all the titles be the default font for (only) English references.
2. I want to add in all the titles (including titles for book, booklet,inbook, proceedings, in proceedings=conference, collection, newspaper, article, mastersthesis, phdthesis, techreport, unpublished; not including other kinds of titles) a 《》for all the (only) Chinese references.
3. I don't want to change the other formats for all the references.

The following figure are the formats for English and Chinese references, which I want. I can only get either for English ones or Chinese ones, but can't get them at the same time.

AND

Who can help me? Any help would be appreciated and welcome!

Answer 1

The definitions you need to modify are found in biblatex-caspervector-utf8.def and caspervector.bbx.

This seems to more or less match what you want (see comments for description):

\documentclass[a4paper,oneside]{ctexbook} 
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@incollection{Aoml1970,
  title     = {Advice on modal logic},
  author    = {D. Scott},
  booktitle = {Philosophical Problems in Logic: Some Recent Developments},
  editor    = {K. Lambert},
  pages     = {143--173},
  year      = {1970},
  publisher = {Springer}
}
@phdthesis{Aecl1971,
  title  = {An Essay in Classical Modal Logic},
  school = {Stanford University},
  author = {K. Segerberg},
  year   = {1971},
  type   = {{PhD} dissertation},
  note   = {\url{http://lpcs.math.msu.su/~zolin/ml/pdf/Segerberg_Essay_1971.pdf}},
}
@article{Lyym1995,
  title    = {方法论研究},
  author   = {神州 and 华夏 and 北极 and 南京},
  year     = {1995},
  journal  = {辽阔大江},
  volume   = {5},
  pages    = {52-56},
  language = {chinese},
}
@inproceedings{talbot97,
  author    = {Talbot, Nicola and Cawley, Gavin’},
  title     = {A fast index assignment algorithm for robust vector quantisation of image data},
  booktitle = {Proceedings of the I.E.E.E. International Conference on Image Processing},
  address   = {Santa Barbara, California, USA},
  year      = {1997},
}
@article{molodtsov1999soft,
  title     = {Soft set theory—first results},
  author    = {Molodtsov, Dmitriy},
  journal   = {Computers \& Mathematics with Applications},
  volume    = {37},
  number    = {4-5},
  pages     = {19--31},
  year      = {1999},
  publisher = {Elsevier}
}
\end{filecontents}
\usepackage[style=caspervector,utf8,sorting=ecnty,seconds=true,maxnames=99]{biblatex}
\addbibresource{\jobname.bib}
\makeatletter
% use English period for Chinese
\renewcommand*\bbx@cnperiod{\addperiod\space}
% Use Chinese opening double quote
\renewcommand*\bbx@cnldquot{《}
% Use Chinese closing double quote
\renewcommand*\bbx@cnrdquot{》}
% Don't use quotes for English
\renewcommand*{\bbx@mybibquote}[1]%
  {\bbx@cepunct{\bbx@cnldquot{#1}\bbx@cnrdquot}{#1}}
% Quote Chinese titles and emphasise English titles
\DeclareFieldFormat*{title}{\bbx@mybibquote{\mkbibemph{#1}}}
\DeclareFieldFormat*{booktitle}{\bbx@mybibquote{\mkbibemph{#1}}}
\DeclareFieldFormat*{maintitle}{\bbx@mybibquote{\mkbibemph{#1}}}
\DeclareFieldFormat*{journaltitle}{\bbx@mybibquote{\mkbibemph{#1}}}
% Don't emphasise English titles for article, etc.
\DeclareFieldFormat[inbook, inproceedings, incollection, article]{title}{%
  \bbx@mybibquote{#1}}
% Don't bold volume
\DeclareFieldFormat*{volume}{#1}
% Don't emphasise year
\DeclareFieldFormat*{year}{#1}
\makeatother
\begin{document}
\nocite{*}
\printbibliography[title = {文献}]
\end{document}