You need a visa for Vietnam if you have a Chinese passport
Visa options for Vietnam
Electronic visitor visa
Travellers need a visa to visit Vietnam for Business or Tourism. An eVisa is the fastest and easiest way of obtaining a visa for Vietnam because travellers can submit their application and supporting documents online. Once the application is approved, travellers receive their eVisa confirmation electronically. Entry to Vietnam with an eVisa is supported at 8 airports, 16 land borders, and 9 seaports. A valid visa is required to board the flight. If the visa is expired or doesn’t match the traveller’s passport information, travellers will not be able to board their flight. Travellers must have a non e-Passport.
This is not offered by sherpa°.
Apply on the government site.