Document and Entity Information [Abstract] Document Type Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, State or Province Entity Address, City or Town 单位地址、邮政邮政编码 City Area Code Local Phone Number Written Communications Soliciting Material Pre-commencement Tender Offer Pre-commencement Issuer Tender Offer Title of 12(b) Security Trading Symbol Security Exchange Name Entity Emerging Growth Company Entity Central Index Key Amendment Flag