I recently started learning Chinese and my teachers use English as a second language. I noticed that many of them use the phrase "Let's back to (page XYZ)" as opposed to "Let's go back to (page XYZ)". I had been speaking English for about 20 years so far and never stumbled upon this phrase, but Wiktionary says it's a valid verb:
(intransitive) To go in the reverse direction. quotations ▼
the train backed into the station; the horse refuses to back
So, is "go" needed here?