1935年年底，在平津形勢日趨嚴(yán)重的情況下，中共中央在陜北瓦窯堡召開了政治局會議，分析形勢，制定斗爭策略；還決定派劉少奇到天津主持北方局工作。發(fā)展北方地區(qū)的民族統(tǒng)一戰(zhàn)線，領(lǐng)導(dǎo)抗日斗爭。
1936年3月下旬，劉少奇由陜北來津重建北方局，并兼任書記。劉少奇和夫人，在津住在今和平區(qū)黑龍江路隆泰里19號的二樓上。劉少奇公開身份是南開大學(xué)教授“周先生” ,在家養(yǎng)病。室內(nèi)陳設(shè)十分簡陋，只有1張木床、1個方桌、1把木椅和一些生活用品。
該地處于原日、法租界交界處，周圍街道里弄，縱橫錯落，四通八達(dá)，既便于隱蔽，又利于轉(zhuǎn)移。當(dāng)時，樓下是 “惠興德成衣鋪” ,只有師徒二人，都是外鄉(xiāng)人，只顧做生意，單純可靠。出入人員可以假裝到成衣店量體裁衣。站在二樓的窗前，可以了望到濱江道和黑龍江路上的動靜，很利于秘密工作者工作、居住。
劉少奇通過林楓，與地方黨組織保持著密切的聯(lián)系，在短短的一年多時間里，成功地領(lǐng)導(dǎo)了“五二八” 天津?qū)W生反日大示威； 卓有成效地推動了抗日民族統(tǒng)一戰(zhàn)線的開展，把天津的抗日救亡運動推向新的高潮。
劉少奇并在此寫下了許多指導(dǎo)黨的工作和白區(qū)斗爭的著述。如以K.Y為名撰寫的《肅清立三路線的殘余——關(guān)門主義、冒險主義》 、《關(guān)于白區(qū)工作給中央的信》 ,以呂文署名撰寫的《論合作抗敵的一封信》 、《論 “全國抗戰(zhàn)是否立刻爆發(fā)” 和救亡陣線當(dāng)前主要的任務(wù)》等等，都是黨的重要文獻(xiàn)。
1982年，天津市人民政府，確定隆泰里19號為市級文物保護(hù)單位，并鑲嵌了一塊用大理石刻制的標(biāo)志牌。上述“天津市市級文物保護(hù)單位——中共北方局舊址” 。

·中共中央北方局舊址

At the end of 1935,the Central Committee of CPC heldpolitburo meeting at Wayaobao in Shaanxi Province,analyzing the status and drawing out strategy. It decidedto send Liu Shaoxi to be in charge of Northern Bureauin Tianjin. The main task was to lead anti-Japan struggleby building the united front in the north.
In late March of 1936,Liu Shaoqi arrived inTianjin from North Shaanxi to rebuild the NorthernBureau. Liu Shaoqi and his wife lived on the secondfloor of Longtaili at Longjiang Road of HepingDistrict. Liu Shaoqi`s public identity was ProfessorZhou of Nankai University who rested at homebecause of illness. The indoor furniture was poor: onewooden bed,one square table,one wooden chair andsome articles for living.
The place was located in between Japanese andFrench concessions. There were many crossed lanes,easy for hiding and transferring. At the downstairs wasHuixing Clothe Shop run by a tailor and his apprentice,who were immigrants busy at making money. The secretagents could pretend to bemaking clothes at the shop. Onthe second floor,they could watch Bingjing Road andHelongjiang Road,which was convenient for them towork and live.
Liu Shaoqi kept close contact with undergroundCommunists by Lin Feng. In a year,he led the 5.28Anti-Japan Student Demonstration,developed the anti-Japan Front Line,and pushed the anti-Japan activities inTianjin to a new era.
Liu Shaoqi wrote many articles to direct the CPCactivities and the fights in enemy-occupied areas,such as"Sweeping the Remaining of Lisanism—Conservatismand Adventurism" and "A Letter to Central Committee ofCPC about the Work in Enemy-Occupied Areas" signed(in the name of K.Y.),and "A Letter about Anti-Enemyby Cooperation" and "Will National Anti-Japan ActivityBreak Out Shortly and Main Tasks of the Frontline ofSaving the Nation form Extinction" (in the name of LuWen).All are important articles of CPC.

·重修后的中共中央北方局舊址