yes.

The Vietnamese Customs prohibits the entry of inflammable, explosive, corrosive, toxic, radioactive and odorous articles, pornographic books, DVDs, animals and plants without quarantine and weapons.

if the tour fee for domestic delegations is carried by a special person, they should declare it when entering the country, or keep it in separate custody, otherwise, the part exceeding $3,111 when leaving the country will be confiscated by the Vietnamese customs. Foreigners can carry 211 cigarettes, 51 cigars, 251 grams of tobacco and 1 liters of alcohol duty-free when leaving Vietnam.

Extended information:

When China citizens enter Vietnam, they need to fill in the entry and exit declaration form in duplicate (in English and Vietnamese), which includes entry, customs, animal and plant quarantine and other contents. The first copy (white) is kept at the Vietnamese border port, and the second copy (yellow) is kept by the immigrants for inspection when leaving the country.

When entering or leaving Vietnam, be sure to understand and abide by the relevant customs regulations in Vietnam, and avoid carrying a lot of cash. If you carry more than 15 million VND (about 4,311 RMB) in cash, or more than 5,111 US dollars (about 3.3 yuan RMB) in foreign currency, you must declare to the customs to avoid unnecessary losses and even serious legal consequences.

China Net-Notes for China Citizens to Go to Vietnam

People's Daily Online-China Embassy reminded me that citizens must abide by the customs declaration regulations when entering and leaving Vietnam with cash.