Do I need a visa for China passport to transit Singapore?

no.

As long as you have a valid visa from a third country and a ticket to leave Singapore, you can enter Singapore within 72 hours without a Singapore visa.

Singapore is one of the visa-free countries for transit. Visitors from mainland China can also enjoy a 96-hour visa-free privilege if they have valid visas or long-term passes (valid for at least one month) from Australia, Canada, Japan, New Zealand, Britain and the United States to transit in Singapore.

Extended information:

1. Countries that exempt ordinary passport visas from each other (13 countries)

United Arab Emirates, Barbados, Bahamas, Bosnia and Herzegovina, Ecuador, Fiji, Grenada, Mauritius, San Marino * * and the United States, Seychelles, Serbia and Montenegro. List of countries or regions that unilaterally allow visa-free entry for China citizens (15)

Asia (2): Indonesia, South Korea (Jeju Island, etc.)

Africa (3): Morocco, French Reunion, Tunisia

America (7): Antigua and Barbuda, Haiti, South Georgia and South Sandwich Islands (British overseas territory Dominica

Oceania (3): American Northern Mariana Islands (Saipan, etc.), Samoa, French Polynesia

3. List of countries and regions that unilaterally allow China citizens to apply for visas on arrival (45)

Asia (2): Azerbaijan, Bahrain, Timor-Leste, Indonesia, Qatar, Laos, Lebanon and Maldives. Armenia, Jordan, Vietnam, Cambodia and Bangladesh

Africa (16): Egypt, Togo, Cape Verde, Gabon, Guinea-Bissau, Comoros, C? te d 'Ivoire, Rwanda, Madagascar, Malawi, Mauritania, Sao Tome and Principe, Tanzania, Uganda, Benin and Zimbabwe

America (4): Bolivia, Guyana and Zimbabwe. St. Helena (British Overseas Territory)

Oceania (4): Palau, Tuvalu, Vanuatu, Papua New Guinea

Europe (1): Ukraine

Reference: entry convenience for China citizens with passports-China consular services.