Introduction to key municipal cultural relics protection units: There are two signs erected in the courtyard of Huashilou. One is a granite stele, which was erected by the Qingdao Municipal Cultural Relics Administration Bureau in 1984 when the Huashi Building was listed as a municipal key cultural relic protection unit; the other is a stainless steel sign, which was erected by the Shandong Provincial People's Government in 1992 when the Huashi Building was listed as a municipal key cultural relic protection unit. Established by provincial cultural relics protection units.