subsequently revised to VIII liedu, the second highest rating in the standard.) GB50223-2004, the national standard for classification of civil seismic fortification before the earthquake, specified Class B for schools exceeding 600 in capacity, kindergartens and child care centers exceeding 200, meaning they must be built to at least 1 liedu higher than the zoned seismic fortification intensity of the area. However, it contained a provision to allow low-rise (three stories and lower) schools to be built to meet the area's fortification intensity (Class C). (The government rushed a revision to the standard after the Wenchuan earthquake. GB 50223-2008 has removed both the provision regarding capacity and the one regarding height to require all schools to meet Class B.) In perspective, Yingxiu Primary School had a collapsed four-story building built in 1999, where 3/4 of the 473 students were dead, whereas Xuankou Middle School had several collapsed buildings from 3 to 4 stories built in 2006, where more than 80% of the 1,200+ students stayed alive. Both schools are located in the town of Yingxiu, Wenchuan nearly at the epicenter of the main quake. Beichuan Middle School in Beichuan, where 80% of buildings collapsed, had two collapsed five-story buildings completed in 1998 that were once named "high quality buildings," killing nearly half of its 2,000+ students. Following GB50223-2004, Xuankou Middle School should have been built to resist VII + I in seismic intensity. Beichuan Middle School and Yingxiu Primary School could have passed with fortification intensity of VII liedu had they been built after 2004; but because they were built before the publication of even GB 500011–2001, they could be using older standards or none at all. Attempt to interfere with survey In justifying the relatively long time CEA used to produce the intensity diagram of the Wenchuan earthquake, Vice President of International Association for Earthquake Engineering XIE Lili () who was a member of the survey team indicated that "some (local government) may want to make more serious estimations of earthquake damage, so they could obtain more compensation," hinting attempts to interfere with the survey. The same news article quoted persons in the know who suggested that another motivation for attempted interference would be to boost intensity in order to evade responsibility for not following seismic design codes. Despite later denial by CEA that the published intensity reflected such interference, MA Zongjin (), Chairman of the National Expert Committee