Buddhists and Taoists have religious practices wherein they separate themselves from worldly affairs and practice asceticism, can that achieve salvation?

Bible Reference:

“Why should the heathen say, Where is now their God? But our God is in the heavens: he has done whatever he has pleased. Their idols are silver and gold, the work of men’s hands. They have mouths, but they speak not: eyes have they, but they see not: They have ears, but they hear not: noses have they, but they smell not: They have hands, but they handle not: feet have they, but they walk not: neither speak they through their throat. They that make them are like to them; so is every one that trusts in them. O Israel, trust you in Jehovah: he is their help and their shield. O house of Aaron, trust in Jehovah: he is their help and their shield. You that fear Jehovah, trust in Jehovah: he is their help and their shield. Jehovah has been mindful of us: he will bless us; he will bless the house of Israel; he will bless the house of Aaron. He will bless them that fear Jehovah, both small and great. Jehovah shall increase you more and more, you and your children. You are blessed of Jehovah which made heaven and earth. The heaven, even the heavens, are Jehovah’s: but the earth has he given to the children of men. The dead praise not Jehovah, neither any that go down into silence. But we will bless Jehovah from this time forth and for ever more Praise Jehovah” (Psm 115:2-18).

The Answer from God’s Word:

At the end of this work, all religions will become one, all creatures will return under the dominion of the Creator, all creatures will worship the one true God, and all cults will come to nothing, never to appear again.

… There are several major religions in the world, and each has its own head, or leader, and the followers are spread across different countries and regions all over the world; every country, be it large or small, has different religions within it. However, regardless of how many religions there are across the world, all people within the universe ultimately exist under the guidance of one God, and their existence is not guided by religious heads or leaders. Which is to say that mankind is not guided by a particular religious head or leader; instead the whole of mankind is led by the Creator, who created the heavens and earth, and all things, and also created mankind—and this is a fact. Although the world has several major religions, regardless of how great they are, they all exist under the dominion of the Creator, and none of them can exceed the scope of this dominion. The development of mankind, social progress, the development of natural sciences—each is inseparable from the arrangements of the Creator, and this work is not something that can be done by a particular religious head. Religious heads are merely the leaders of a particular religion, and cannot represent God, or the One who created the heavens and earth and all things. Religious heads can lead all those within the entire religion, but cannot command all creatures beneath the heavens—this is a universally acknowledged fact. Religious heads are mere leaders, and cannot stand equal to God (the Creator). All things are in the hands of the Creator, and in the end they will all return to the hands of the Creator. Mankind was originally made by God, and regardless of the religion, every person will return under the dominion of God—this is inevitable. Only God is the Most High among all things, and the highest ruler among all creatures must also return under His dominion. No matter how high the status of man, he cannot take mankind to a suitable destination, and no one is able to class all things according to kind. Jehovah Himself created mankind and classed each according to kind, and when the end time arrives He will still do His own work Himself, classing all things according to kind—and this cannot be done by any apart from God. … for throughout the entire universe there only exists this one God, and there are no other religions. He who is incapable of creating the world will be incapable of bringing it to an end, whereas He who created the world will surely bring it to an end, and so if one is unable to bring the age to an end and is merely able to help man cultivate his mind, then he will surely not be God, and will surely not be the Lord of mankind. He will be incapable of doing such great work; there is only one who can carry out such work, and all that are unable to do this work are surely the enemies other than God. If they are cults, then they are incompatible with God, and if they are incompatible with God, then they are the enemies of God. All work is done by this one true God, and the entire universe is commanded by this one God.

from “Knowing the Three Stages of God’s Work Is the Path to Knowing God” in The Word Appears in the Flesh

The standard by which man judges man is based on his behavior; one whose conduct is good is a righteous person, and one whose conduct is abominable is wicked. The standard by which God judges man is based on whether one’s essence obeys Him; one who obeys God is a righteous person, and one who does not obey God is an enemy and a wicked person, regardless of whether this person’s behavior is good or bad, and regardless of whether this person’s speech is correct or incorrect. Some people wish to use good deeds to obtain a good destination of the future, and some people wish to use good speech to purchase a good destination. People falsely believe that God determines man’s outcome according to his behavior or speech, and therefore many people will seek to use this to gain a temporary favor through deceit.

from “God and Man Will Enter Into Rest Together” in The Word Appears in the Flesh

But so long as the old world continues to exist, I will hurl forth My rage upon its nations, openly promulgating My administrative decrees throughout the universe, and visit chastisement on whomever violates them:

As I turn My face to the universe to speak, all mankind hears My voice, and thereupon sees all the works I have wrought throughout the universe. Those who go contrary to My will, that is to say, who oppose Me with the deeds of man, will fall down under My chastisement. I will take the multitudinous stars in the heavens and make them anew, and thanks to Me the sun and the moon will be renewed—the skies will no longer be as they were; the myriad things on the earth will be renewed. All will become complete through My words. The many nations within the universe will be partitioned afresh and replaced by My nation, so that the nations upon the earth will disappear forever and become a nation that worships Me; all the nations of the earth will be destroyed, and will cease to exist. Of the human beings within the universe, all those belonging to the devil will be exterminated; all who worship Satan will be laid low by My burning fire—that is, except for those now within the stream, the rest will be turned to ashes.

from “The Twenty-sixth Utterance” of God’s Utterances to the Entire Universe in The Word Appears in the Flesh

There are now many people who are unable to perceive humanity’s future destination and who also do not believe the words I speak; all those who do not believe, along with those who do not practice truth, are demons! Those who seek and those who do not seek are now two different types of people, and they are two types of people with two different destinations. Those who pursue knowledge of the truth and practice the truth are the people whom God will save. Those who do not know the true way are demons and enemies; they are the descendants of the archangel and will be destroyed. Even the pious believers of a vague God—are they not also demons? People who possess good consciences but do not accept the true way are demons; their essence is one of resistance to God. Those who do not accept the true way are those who resist God, and even if these people endure many hardships, they will still be destroyed. … Anyone who does not believe in God incarnate is demonic; more so, they will be destroyed.

from “God and Man Will Enter Into Rest Together” in The Word Appears in the Flesh