keep the Both Language as PURE as Possible

Try to Reduce the Impact and Confusion by  at Least Separating the Chinese Letter and the English Letter. Although it is some Common case to mix more than two language in One Sentence. This is first clarify Not to Boost about one Language Ability. But it is  a Common thing in Life in Singapore.

Suspect this is a Pollution of Language. Many see it as a convenience sake.
Not Too helpful in the Long Term.
Trying to keep the Both Language as PURE as Possible.
Which is Impossible in the Singapore Context and Geo Situation.