Change CJK fonts in default fontset

Question

Is there a way to change the CJK fonts used in the default fontset? Currently, when I open the HELLO file using C-h h, I see:

• Japanese (日本語) こんにちは / ｺﾝﾆﾁﾊ with charset japanese-jisx0208 and font mac-ct:-*-Hiragino Sans-normal-normal-normal-*-16-*-*-*-p-0-iso10646-1;
• Chinese (中文,普通话,汉语) 你好 with charset chinese-gb2312 and font mac-ct:-*-PingFang SC-normal-normal-normal-*-16-*-*-*-p-0-iso10646-1;
• Cantonese (粵語,廣東話) 早晨, 你好 with charset chinese-big5-1 and font mac-ct:-*-PingFang TC-normal-normal-normal-*-16-*-*-*-p-0-iso10646-1; and
• Korean (한글) 안녕하세요 / 안녕하십니까 with charset korean-ksc5601 and font mac-ct:-*-Apple SD Gothic Neo-normal-normal-normal-*-16-*-*-*-p-0-iso10646-1.

Let’s say I wanted to use the Noto Sans Mono CJK fonts instead of the macOS defaults. Evaluating

(set-fontset-font "fontset-startup" 'chinese-big5-1
                  (font-spec :family "Noto Sans Mono CJK TC") nil t)

causes both Chinese and Cantonese to use it, while I would like only Cantonese to use Traditional Chinese. (Likewise with chinese-gb2312 and Simplified Chinese.)

I could not figure out how the default fontset is configured to cleanly differentiate Japanese, Simplified Chinese, Traditional Chinese, and Korean.