Shenme shi "yi1 yu3 shuang1 wen2"?
"yi1 yu3 shuang1 wen2" jiushi you4 yong Hanzi you4 yong Hanyu Pinyin.
"yi yuu shuang wern" jiushi youh yong Hanzi youh yong Hanyu Pinyin.
Shenme shi "yi1 yu3 shuang1 wen2"?
Re: Shenme shi "yi1 yu3 shuang1 wen2"?
One spoken language, two ways to write it (two written language)
Re: Shenme shi "yi1 yu3 shuang1 wen2"?
yi yu shuang guan is another thing...
it's a double entendre
ax
it's a double entendre

ax
Re: Shenme shi "yi1 yu3 shuang1 wen2"?
PY
From your explanation, could "yi1 yu3 shuang1 wen2" be actually "yin1 yu3 shuang1 wen2" (音语双文) ? When one uses both "yin1" (音, sound) and "yu3" (语, language or words) together to write Chinese, one uses both Hanzi and Hanyu Pinyin. This fulfills what you mentioned: "you3 yong4 Hanzi, you3 yong4 Hanyu Pinyin, 有用汉字, 有用汉语拼音).
From your explanation, could "yi1 yu3 shuang1 wen2" be actually "yin1 yu3 shuang1 wen2" (音语双文) ? When one uses both "yin1" (音, sound) and "yu3" (语, language or words) together to write Chinese, one uses both Hanzi and Hanyu Pinyin. This fulfills what you mentioned: "you3 yong4 Hanzi, you3 yong4 Hanyu Pinyin, 有用汉字, 有用汉语拼音).