1) China Mobile and China Unicom can only use "GSM" abroad. However, roaming in this way is extremely expensive. If you use a lot, you can buy a Singapore ID card and an international direct dial password card (both of which are at least S $ 18) when you go to Singapore.

2) Cash exchange: change the Singapore dollar into 500-600 yuan before going abroad. When you arrive in Singapore, you can get the most favorable exchange rate in the financial district of the city (Lai Fuji Square) or Pearl Square; No hotel or shopping mall in Singapore will give you the best exchange rate.

3) Shopping: Orchard Road Underground City, from Huidefeng Square to Yi 'an City, Chinatown Chinatown, Chinatown, Tang Cheng Square and Pearl Square.

4) Catering: along the Singapore River

5) There are duty-free shops at the airport, and you can get a tax refund if you buy more than S $500.

6) Have a nice trip (I also went back to Singapore on June 22nd for about two weeks).