Wrong,
Guangzhou will send DS-230 part 1 in packet 3, and will send part 2 in packet 4, Part 2 is needed at the interview, and the last part on page 4 needed to be signed in front of the consular officer.
Is there something on part 2 that you think will cause a problem?
http://guangzhou.usconsulate.gov/iv_faq.html