6. Intangible Assets - Net (Details - land use) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Intangible assets, gross	$ 762,074	$ 743,864
Less: accumulated amortization	(77,251)	(71,686)
May 2013 - Apr 2063 [Member]
Intangible assets, gross	536,438	523,619
Dec 2015 - Sept 2065 [Member]
Intangible assets, gross	201,156	196,349
Dec. 2015 to Sept 2065 [Member]
Intangible assets, gross	$ 24,480	$ 23,896

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant