Tight security will accompany this weekend's campus visits by Chinese President Jiang Zemin and U.S. Vice President Al Gore '69.

Annenberg Dining Hall will close and will not serve breakfast to first-years and their parents Saturday morning as part of the security preparations for Jiang's 11 a.m. speech in Sanders Theatre, the University announced yesterday.

And entrance to Harvard Yard all day Saturday will require University identification.

The Chinese President's motorcade is expected to arrive at Harvard between 10:00 and 10:30 Saturday morning, according to published reports of his itinerary.

Gore will begin a campus visit Friday afternoon with a 3 p.m. speech at the John F. Kennedy School of Government's Arco Forum.

To top it all off, more than a thousand first-year parents, including Gore, are expected to flood Harvard Yard for first-year parents' weekend.

The Freshman Dean's Office announced in an e-mail that most of the gates to the Yard will be locked early Saturday "to ensure the Harvard community's access to events scheduled for the Yard and Tercentary [Theatre] that day."

Students will be required to show their Harvard I.D. to Harvard University Police (HUPD) officers who will be manning the open gates.

The parents of first-years will receive special identification when they register in Boylston Hall's Ticknor Lounge Friday and must present it to enter the Yard, the e-mail said.

The visit of the two high-profile dignitaries and first-year parents weekend creates a special set of security and logistical concerns, according to James F. Sloan, the special agent in charge of the Secret Service field office in Boston.

The agency is in charge of protecting Gore and visiting heads of state such as Jiang, Sloan said.

Overall, the Secret Service must balance public safety concerns with its need to provide security for "pro- tectees", Sloan said.

"I think it's safe to say that we'll be able to provide the protection we require for the people we protect and still be able to accomodate most if not all of the events of parent's weekend," Sloan said.

The Secret Service, along the HUPD and the Cambridge Police Department are working together on security issues, Sloan said.

Sloan said he hopes any inconvenience to students and parents will be minimal.

"We want the freshmen parents to enjoy their weekend with their sons and daughters at Harvard," he said.