来/到 + 这儿 / 在 + 这儿
The pronoun 这儿 (zhèr) means "here" or "this place" and is used to indicate a location close to the speaker. It is the colloquial northern Chinese equivalent of 这里 (zhèlǐ) and is commonly used in spoken Mandarin.
你先在这儿等我一下,我马上回来。
Nǐ xiān zài zhèr děng wǒ yīxià, wǒ mǎshàng huílái.
Wait here for me for a moment; I'll be right back.
这儿的风景真不错,我们拍张照吧。
Zhèr de fēngjǐng zhēn bùcuò, wǒmen pāi zhāng zhào ba.
The scenery here is really nice; let's take a photo.
请把行李放在这儿就好了。
Qǐng bǎ xínglǐ fàng zài zhèr jiù hǎo le.
Please just put the luggage here.