If you buy a house in Guangzhou and apply for a mortgage from a bank instead of a one-time payment, you need to provide proof of the number of houses in your name when you apply for a loan from the bank. To apply for the certificate of the number of property units under the name, the buyer needs to bring the original ID card, household registration book and marriage certificate of himself, his spouse and minor children to the search window of the real estate transaction registration center in each district. Address of real estate transaction registration centers in all districts: Guangzhou Real Estate Transaction Registration Center, address: No.31 Huajiu Road, Zhujiang New Town, Tianhe District (near Zhujiang New Town Station of Metro Lines 3 and 5 and Guangzhou Municipal Affairs Service Center), take Metro Lines 3 and 5 to Zhujiang New Town Station, turn right after leaving the A1 exit, turn left after passing the Zhujiang New Town Campus of the Local Taxation Bureau and Xianlie East Road Primary School, and arrive after meeting Guangzhou Bank and Bank of Communications. Guangzhou Haizhu District Real Estate Transaction Registration Center, Address: No.45, Baogang Road, Haizhu District (near Nanbei Square, Deng Shichang Memorial Hall and Haizhu District Public Security Bureau). If you take a bus, you can get off at Baogang Avenue by bus No.250, No.270 and No.244, go straight into the cross road next to Guangzhou Rural Commercial Bank, and you will arrive after you see China Construction Bank. Guangzhou Liwan District Real Estate Registration Exchange: Address: No.5 Huannan Street, Huanhua Road, Fangcun, Liwan District. If you take a bus, you can take the bus No.91, No.69, No.70, No.207 and No.1, get off at Huanhua Road Station, and then go straight along Huannan Street next to Fangcun Sub-branch of Bank of Guangzhou for 50 meters. Guangzhou Tianhe District Real Estate Registration Exchange: Address: Dongfang No.3 Road, Tianhe District (near the East Campus of Tianhe Park West Gate and No.113 Middle School). Go straight along Dongfang No.3 Road opposite the west gate of Tianhe Park for 200 meters. Guangzhou Baiyun District Real Estate Transaction Registration Center, address: at the junction of Airport Road and Yuanjing Road, on the second floor of Baiyun District Government Affairs Center. Take bus No.268, 244, 286, 810 and get off at Baiyun Administration Center Station. Guangzhou Huangpu District Real Estate Registration Exchange, Address: Taijing Middle Street, Dasha North Road, Huangpu District, Guangzhou (Dasha East Station of Metro Line 5) Guangzhou Panyu District Real Estate Transaction Registration Office: Address: Guangzhou Huadu District Real Estate Transaction Registration Office, No.18 Shiqiao Dongxing Road, Panyu District, Guangzhou: Address: Opposite to Xiuquan Park, Xinhua Street, Huadu District, Guangzhou, near Huadu District Hospital.