Improving the performance of Bayesian phylogenetic inference under relaxed clock models.

"availability of data and materials the source code of the proposed operator and the data sets analysed during the current study are available in the github repository ( https://github com/rong419/constantdistanceoperator git ). availability of data and materials the source code of the proposed operator and the data sets analysed during the current study are available in the github repository ( https://github com/rong419"

"availability of data and materials the source code of the proposed operator and the data sets analysed during the current study are available in the github repository ( https://github com/rong419/constantdistanceoperator git )."

"Competing interests The authors declare that they have no competing interests."

"Funding The author(s) would like to acknowledge support from a Royal Society of New Zealand Marsden award (#UOA1611; 16-UOA-277). This work is also partially supported by scholarship from China Scholarship Council (No.201706990021)."