Latex: When more than three authors are referenced, the third author adds a comma followed by an et Al.__latex

Question: For the cited literature, when the author of the literature is redundant 3, we need to shrink it slightly et al. how do you automate this process without changing each author to and others?

Method 1:
If you use a reference reference to the Biblatex pattern, you can control it through the maxnames option.

\usepackage[style=alphabetic,maxnames=4,minnames=3,maxbibnames=99]{biblatex}

Method 2:
If you are using the Natbib mode reference reference, you will need to manually modify the *.bst file.

\usepackage[super,square,numbers,sort&compress]{natbib}% for Super citation

The modification method is as follows:

% #0 turns off the forced use of "et al."
% #1 enables  
FUNCTION {default.is.forced.et.al} {#1}% is closed by default, and you need to open the

% set number of authors after adding et al.  The following sets the 3
function {default.max.num.names.before.forced.et.al} {#3}

function { default.num.names.shown.with.forced.et.al} {#3}

After the steps above, et al. can appear automatically, but there is no comma before it, you need to modify the following:

% precede with comma
FUNCTION {bbl.etal}{", ~et~al."}

% modifying a line of function
{format.names} that contains bbl.etal in

double quotes removes the space
{"" * bbl.etal emphasize *}