Are there Escher sentences in Chinese? [kinda technical]
&quot;More people have been to Russia than I have&quot; doesn't make sense in English, therefore, it wouldn't make sense in Chinese neither.
(2)-(4) would not be considered grammatical by native Chinese speakers at all.
&quot;Many people have been to Russia more than I have&quot;  (有很多去俄羅斯比我去得多的人 ) does make sense.
As for 病句 (ill sentences), some people do say things ungrammatically, mainly due to mistaken word type (e.g. mistaken adjective as adverb) or wrongly omit things that shouldn't be omitted
Example:

他很有勇氣 (he has courage) --&gt; 他很有勇敢 (he has brave)
勇敢 is mainly an adjective or adverb, using it as a noun require a classifier, e.g. 這份勇敢 (this bravery)

~

無法無天的行動 (lawless act) --&gt; 無法行動 (can't take action)
reduce 無法無天 (lawless) to 無法 (cannot) and omit the adjective marker &quot;的&quot; change the meaning completely

However 驚天動地的行動 (earth-shattering action) can be reduced to 驚天行動 and the meaning of the sentence would not be changed because 驚天 is clearly referring to 驚天動地