Year Ended December 31

Investing activities

2020

2021

2022

NT$

NT$

NT$

(In Millions)

Additions of property, plant and equipment

$

25,195

$

35,613

$

31,265

Changes in other payables

(1,684

)

(280

)

270

Payments for acquisition of property, plant and equipment

$

23,511

$

35,333

$

31,535

Additions of investment properties

$

1,359

$

1

$

18

Trade-in investment properties from asset exchange transaction 
     (Note 16)

(1,305

)

—

—

Payments for acquisition of investment properties

$

54

$

1

$

18

Additions of intangible assets

$

48,605

$

256

$

1,893

Changes in other assets

(1,000

)

—

—

Payments for acquisition of intangible assets

$

47,605

$

256

$

1,893

The carrying amounts of disposal of property, plant and 
     equipment

$

307

$

30

$

21

Gain (loss) on disposal of property, plant and equipment

1,428

(3

)

(5

)

Trade-in investment properties from asset exchange transaction 
     (Note 16)

(1,305

)

—

—

Changes in other payables

(80

)

—

—

Changes in other current monetary assets

(31

)

—

—

Proceeds from disposal of property, plant and equipment

$

319

$

27

$

16

The carrying amounts of disposal of financial assets at fair value 
     through other comprehensive income

$

568

$

2,705

$

—

Changes in other current monetary assets

(271

)

271

—

Reclassified to investment accounted for using equity method

—

(64

)

—

Proceeds from disposal of financial assets at fair value through 
     other comprehensive income

$

297

$

2,912

$

—