Shopping language
A typical formal greeting when you enter the store is 欢迎光临 (huānyíng guānglín) 'Welcome' followed by
你想买点儿什么? or 你想来点儿什么?
(Nǐ xiǎng mǎi / lái diǎnr shénme?)
'Would you like to buy something?'
If you want to say that you are just browsing you might say:
我可以看看吗? (Wǒ kěyǐ kànkan ma?) 'Can I have a look?'
我看一下。 (Wǒ kàn yī xià.) 'I am just having a look.'
and to ask if you can select some items you can say:
我挑几个，可以吗? (Wǒ tiáo jǐ ge, kěyǐ ma?) Can I select some? (e.g. apples)
When you leave the store you might hear 满走 (màn zǒu) , literally 'slow go' or 欢迎再来 (huānyíng zài lái) 'Please come again'.